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139-559: The organization was founded in 1971 as the Sierra Club Legal Defense Fund, though it was fully independent from the Sierra Club . The name was changed to Earthjustice in 1997. This was thought to better reflect its role as a legal advocate which represents hundreds of regional, national and international organizations. As of September 2018, the group has provided free legal representation to more than 1,000 clients ranging from

278-581: A Montana company) who holds the mining claims and is developing the mine plan, but even the parent corporation (in this case Noranda Corporation, a Canadian company), could be held liable for violations of the Federal Clean Water Act (Ekey, 1997). In 1998, Earthjustice helped local community groups convince the U.S. Nuclear Regulatory Commission to withdraw an approval to construct a uranium enrichment plant between two low-income, predominantly African-American communities near Homer, Louisiana . It

417-480: A beneficial environmental impact, the Sierra Club expressed opposition to such reforms, arguing "Whatever the proposed project is — whether it's a pipeline or a highway or a solar farm — it should be subject to the same commonsense review process. If we want these projects to move forward faster, we shouldn't be weakening environmental laws, but investing more resources into the agencies and staff." The Sierra Club has

556-549: A broader sense also includes previous long-term changes to Earth's climate. The current rise in global temperatures is driven by human activities , especially fossil fuel burning since the Industrial Revolution . Fossil fuel use, deforestation , and some agricultural and industrial practices release greenhouse gases . These gases absorb some of the heat that the Earth radiates after it warms from sunlight , warming

695-610: A dam and aqueduct on the Tuolumne River, one of the largest southern Sierra rivers, as a way to increase and stabilize the city's water supply. Gifford Pinchot , a progressive supporter of public utilities and head of the US Forest Service , which then had jurisdiction over the national parks, supported the creation of the Hetch Hetchy dam. Muir appealed to his friend U.S. President Roosevelt, who would not commit himself against

834-587: A decadal timescale. Other changes are caused by an imbalance of energy from external forcings . Examples of these include changes in the concentrations of greenhouse gases , solar luminosity , volcanic eruptions, and variations in the Earth's orbit around the Sun. To determine the human contribution to climate change, unique "fingerprints" for all potential causes are developed and compared with both observed patterns and known internal climate variability . For example, solar forcing—whose fingerprint involves warming

973-482: A history of filing lawsuits against new housing developments and trying to block legislative proposals to ease housing construction. Critics have characterized the Sierra Club's actions on housing as NIMBYism . In 2012, the Sierra Club sued to block the construction of a mixed-use development composed of 16,655 housing units (for an estimated 37,000 residents) and commercial space in Riverside, California. In 2018,

1112-546: A large Yosemite National Park surrounding the much smaller state park which had been created in 1864. This campaign succeeded in 1890. As early as 1889, Johnson had encouraged Muir to form an "association" to help protect the Sierra Nevada , and preliminary meetings were held to plan the group. Others involved in the early planning included artist William Keith , Willis Linn Jepson , Warren Olney , Willard Drake Johnson , Joseph LeConte and David Starr Jordan . In May 1892,

1251-532: A lot of light to being dark after the ice has melted, they start absorbing more heat . Local black carbon deposits on snow and ice also contribute to Arctic warming. Arctic surface temperatures are increasing between three and four times faster than in the rest of the world. Melting of ice sheets near the poles weakens both the Atlantic and the Antarctic limb of thermohaline circulation , which further changes

1390-538: A major part of Sierra Club culture, and in some chapters, constitute the majority of member activity. Other chapters, however, may sponsor very few outdoor or recreational activities, being focused solely on political advocacy. Generally, chapters in California are much more active with regard to outdoor activities. The Sierra Club presents a number of annual awards, such as the Sierra Club John Muir Award ,

1529-467: A majority in 1968, but in the April 1969 election the anti-Brower candidates won all five open positions. Ansel Adams and president Richard Leonard, two of his closest friends on the board, led the opposition to Brower, charging him with financial recklessness and insubordination and calling for his ouster as executive director. The board voted ten to five to accept Brower's resignation. Eventually reconciled with

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1668-412: A marked increase in temperature. Ongoing changes in climate have had no precedent for several thousand years. Multiple independent datasets all show worldwide increases in surface temperature, at a rate of around 0.2 °C per decade. The 2014–2023 decade warmed to an average 1.19 °C [1.06–1.30 °C] compared to the pre-industrial baseline (1850–1900). Not every single year was warmer than

1807-408: A physical climate model. These models simulate how population, economic growth , and energy use affect—and interact with—the physical climate. With this information, these models can produce scenarios of future greenhouse gas emissions. This is then used as input for physical climate models and carbon cycle models to predict how atmospheric concentrations of greenhouse gases might change. Depending on

1946-457: A result of climate change. Global sea level is rising as a consequence of thermal expansion and the melting of glaciers and ice sheets . Sea level rise has increased over time, reaching 4.8 cm per decade between 2014 and 2023. Over the 21st century, the IPCC projects 32–62 cm of sea level rise under a low emission scenario, 44–76 cm under an intermediate one and 65–101 cm under

2085-474: A result. The World Health Organization calls climate change one of the biggest threats to global health in the 21st century. Societies and ecosystems will experience more severe risks without action to limit warming . Adapting to climate change through efforts like flood control measures or drought-resistant crops partially reduces climate change risks, although some limits to adaptation have already been reached. Poorer communities are responsible for

2224-406: A single issue with some kind of geography involved. While much activity is coordinated at a local level, the club is a unified organization; decisions made at the national level take precedence, including the removal and creation of chapters, as well as recruiting and removing members. The club is known for engaging in two main activities: promoting and guiding outdoor recreational activities, which

2363-417: A small share of global emissions , yet have the least ability to adapt and are most vulnerable to climate change . Many climate change impacts have been observed in the first decades of the 21st century, with 2023 the warmest on record at +1.48 °C (2.66 °F) since regular tracking began in 1850. Additional warming will increase these impacts and can trigger tipping points , such as melting all of

2502-457: A substantial amount of the early development of climbing. Much of this activity occurred in the group's namesake, the Sierra Nevada . The Sierra Club operates only in the United States and holds the legal status of 501(c)(4) nonprofit social welfare organization. Sierra Club Canada is a separate entity. The Sierra Club's stated mission is "To explore, enjoy, and protect the wild places of

2641-538: A very high emission scenario. Marine ice sheet instability processes in Antarctica may add substantially to these values, including the possibility of a 2-meter sea level rise by 2100 under high emissions. Climate change has led to decades of shrinking and thinning of the Arctic sea ice . While ice-free summers are expected to be rare at 1.5 °C degrees of warming, they are set to occur once every three to ten years at

2780-519: A warming level of 2 °C. Higher atmospheric CO 2 concentrations cause more CO 2 to dissolve in the oceans, which is making them more acidic . Because oxygen is less soluble in warmer water, its concentrations in the ocean are decreasing , and dead zones are expanding. Greater degrees of global warming increase the risk of passing through ' tipping points '—thresholds beyond which certain major impacts can no longer be avoided even if temperatures return to their previous state. For instance,

2919-492: A wide range of clients and causes, ranging from those well within the political and scientific mainstream to "radical fringe groups with a reputation for outrageous claims and uncompromising positions." Similarly, Fargo, North Dakota , columnist Rob Port has described Earthjustice as fundamentally "obstructionist" in their strategy against the Dakota Access Pipeline during 2016. Sierra Club The Sierra Club

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3058-608: Is an American environmental organization with chapters in all 50 U.S. states , Washington D.C. , and Puerto Rico . The club was founded in 1892, in San Francisco, by preservationist John Muir . A product of the progressive movement , it was one of the first large-scale environmental preservation organizations in the world. Since the 1950s, it has lobbied politicians to promote environmentalist policies, even if they are controversial. Recent goals include promoting sustainable energy and mitigating global warming , as well as opposing

3197-557: Is an estimated total sea level rise of 2.3 metres per degree Celsius (4.2 ft/°F) after 2000 years. Oceanic CO 2 uptake is slow enough that ocean acidification will also continue for hundreds to thousands of years. Deep oceans (below 2,000 metres (6,600 ft)) are also already committed to losing over 10% of their dissolved oxygen by the warming which occurred to date. Further, the West Antarctic ice sheet appears committed to practically irreversible melting, which would increase

3336-711: Is determined by modelling the carbon cycle and climate sensitivity to greenhouse gases. According to UNEP , global warming can be kept below 1.5 °C with a 50% chance if emissions after 2023 do not exceed 200 gigatonnes of CO 2 . This corresponds to around 4 years of current emissions. To stay under 2.0 °C, the carbon budget is 900 gigatonnes of CO 2 , or 16 years of current emissions. The climate system experiences various cycles on its own which can last for years, decades or even centuries. For example, El Niño events cause short-term spikes in surface temperature while La Niña events cause short term cooling. Their relative frequency can affect global temperature trends on

3475-417: Is done throughout the United States but primarily in California (especially Southern California), and political activism to promote environmental causes. Described as one of the United States' "leading environmental organizations", the Sierra Club makes endorsements of individual candidates for elected office. Journalist Robert Underwood Johnson had worked with John Muir on the successful campaign to create

3614-474: Is elected annually by the Board from among its members. The executive director runs the day-to-day operations of the group. Michael Brune , formerly of Rainforest Action Network , served as the organization's executive director from 2010. Brune succeeded Carl Pope . Pope stepped down amid discontent that the group had strayed from its core principles. In January 2023, former NAACP president Ben Jealous became

3753-399: Is independent of where greenhouse gases are emitted, because the gases persist long enough to diffuse across the planet. Since the pre-industrial period, the average surface temperature over land regions has increased almost twice as fast as the global average surface temperature. This is because oceans lose more heat by evaporation and oceans can store a lot of heat . The thermal energy in

3892-450: Is primarily attributed to sulfate aerosols produced by the combustion of fossil fuels with heavy sulfur concentrations like coal and bunker fuel . Smaller contributions come from black carbon (from combustion of fossil fuels and biomass), and from dust. Globally, aerosols have been declining since 1990 due to pollution controls, meaning that they no longer mask greenhouse gas warming as much. Aerosols also have indirect effects on

4031-444: Is radiating into space. Warming reduces average snow cover and forces the retreat of glaciers . At the same time, warming also causes greater evaporation from the oceans , leading to more atmospheric humidity , more and heavier precipitation . Plants are flowering earlier in spring, and thousands of animal species have been permanently moving to cooler areas. Different regions of the world warm at different rates . The pattern

4170-516: Is shaped by feedbacks, which either amplify or dampen the change. Self-reinforcing or positive feedbacks increase the response, while balancing or negative feedbacks reduce it. The main reinforcing feedbacks are the water-vapour feedback , the ice–albedo feedback , and the net effect of clouds. The primary balancing mechanism is radiative cooling , as Earth's surface gives off more heat to space in response to rising temperature. In addition to temperature feedbacks, there are feedbacks in

4309-407: Is the major reason why different climate models project different magnitudes of warming for a given amount of emissions. A climate model is a representation of the physical, chemical and biological processes that affect the climate system. Models include natural processes like changes in the Earth's orbit, historical changes in the Sun's activity, and volcanic forcing. Models are used to estimate

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4448-417: Is unclear. A related phenomenon driven by climate change is woody plant encroachment , affecting up to 500 million hectares globally. Climate change has contributed to the expansion of drier climate zones, such as the expansion of deserts in the subtropics . The size and speed of global warming is making abrupt changes in ecosystems more likely. Overall, it is expected that climate change will result in

4587-743: The Ansel Adams Award for Conservation Photography , the Francis P. Farquhar Mountaineering Award , the Edgar Wayburn Award for public officials, the Rachel Carson Award for journalists and writers, the William O. Douglas Award for legal work, and the EarthCare Award for international environmental protection and conservation. Land management, access, conservation are traditionally considered

4726-507: The Atlantic meridional overturning circulation (AMOC), and irreversible damage to key ecosystems like the Amazon rainforest and coral reefs can unfold in a matter of decades. The long-term effects of climate change on oceans include further ice melt, ocean warming , sea level rise, ocean acidification and ocean deoxygenation. The timescale of long-term impacts are centuries to millennia due to CO 2 's long atmospheric lifetime. The result

4865-657: The Earth's energy budget . Sulfate aerosols act as cloud condensation nuclei and lead to clouds that have more and smaller cloud droplets. These clouds reflect solar radiation more efficiently than clouds with fewer and larger droplets. They also reduce the growth of raindrops , which makes clouds more reflective to incoming sunlight. Indirect effects of aerosols are the largest uncertainty in radiative forcing . While aerosols typically limit global warming by reflecting sunlight, black carbon in soot that falls on snow or ice can contribute to global warming. Not only does this increase

5004-487: The George Floyd protests and subsequent public reconciliation of systematic racism in public history , the Sierra Club described their own early history as intermingled with racism. In particular, the early Sierra Club favored the needs of white members to the exclusion of people of color, and Muir and some of his associates, such as Joseph LeConte , David Starr Jordan , and Henry Fairfield Osborn were closely related to

5143-851: The Grand Canyon . The book Time and the River Flowing: Grand Canyon authored by Francois Leydet was published in the Exhibit Format book series. Opposing the Bridge Canyon and Marble Canyon dam projects, full-page ads the club placed in The New York Times and The Washington Post in 1966 exclaimed, "This time it's the Grand Canyon they want to flood," and asked, "Should we also flood the Sistine Chapel so tourists can get nearer

5282-568: The Greenland ice sheet is already melting, but if global warming reaches levels between 1.7 °C and 2.3 °C, its melting will continue until it fully disappears. If the warming is later reduced to 1.5 °C or less, it will still lose a lot more ice than if the warming was never allowed to reach the threshold in the first place. While the ice sheets would melt over millennia, other tipping points would occur faster and give societies less time to respond. The collapse of major ocean currents like

5421-835: The Greenland ice sheet . Under the 2015 Paris Agreement , nations collectively agreed to keep warming "well under 2 °C". However, with pledges made under the Agreement, global warming would still reach about 2.8 °C (5.0 °F) by the end of the century. Limiting warming to 1.5 °C would require halving emissions by 2030 and achieving net-zero emissions by 2050. Fossil fuel use can be phased out by conserving energy and switching to energy sources that do not produce significant carbon pollution. These energy sources include wind , solar , hydro , and nuclear power . Cleanly generated electricity can replace fossil fuels for powering transportation , heating buildings , and running industrial processes. Carbon can also be removed from

5560-626: The Industrial Revolution , naturally-occurring amounts of greenhouse gases caused the air near the surface to be about 33 °C warmer than it would have been in their absence. Human activity since the Industrial Revolution, mainly extracting and burning fossil fuels ( coal , oil , and natural gas ), has increased the amount of greenhouse gases in the atmosphere. In 2022, the concentrations of CO 2 and methane had increased by about 50% and 164%, respectively, since 1750. These CO 2 levels are higher than they have been at any time during

5699-509: The World Economic Forum , 14.5 million more deaths are expected due to climate change by 2050. 30% of the global population currently live in areas where extreme heat and humidity are already associated with excess deaths. By 2100, 50% to 75% of the global population would live in such areas. While total crop yields have been increasing in the past 50 years due to agricultural improvements, climate change has already decreased

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5838-414: The carbon cycle . While plants on land and in the ocean absorb most excess emissions of CO 2 every year, that CO 2 is returned to the atmosphere when biological matter is digested, burns, or decays. Land-surface carbon sink processes, such as carbon fixation in the soil and photosynthesis, remove about 29% of annual global CO 2 emissions. The ocean has absorbed 20 to 30% of emitted CO 2 over

5977-402: The climate system . Solar irradiance has been measured directly by satellites , and indirect measurements are available from the early 1600s onwards. Since 1880, there has been no upward trend in the amount of the Sun's energy reaching the Earth, in contrast to the warming of the lower atmosphere (the troposphere ). The upper atmosphere (the stratosphere ) would also be warming if the Sun

6116-971: The extinction of many species. The oceans have heated more slowly than the land, but plants and animals in the ocean have migrated towards the colder poles faster than species on land. Just as on land, heat waves in the ocean occur more frequently due to climate change, harming a wide range of organisms such as corals, kelp , and seabirds . Ocean acidification makes it harder for marine calcifying organisms such as mussels , barnacles and corals to produce shells and skeletons ; and heatwaves have bleached coral reefs . Harmful algal blooms enhanced by climate change and eutrophication lower oxygen levels, disrupt food webs and cause great loss of marine life. Coastal ecosystems are under particular stress. Almost half of global wetlands have disappeared due to climate change and other human impacts. Plants have come under increased stress from damage by insects. The effects of climate change are impacting humans everywhere in

6255-432: The socioeconomic scenario and the mitigation scenario, models produce atmospheric CO 2 concentrations that range widely between 380 and 1400 ppm. The environmental effects of climate change are broad and far-reaching, affecting oceans , ice, and weather. Changes may occur gradually or rapidly. Evidence for these effects comes from studying climate change in the past, from modelling, and from modern observations. Since

6394-405: The 18th century and 1970 there was little net warming, as the warming impact of greenhouse gas emissions was offset by cooling from sulfur dioxide emissions. Sulfur dioxide causes acid rain , but it also produces sulfate aerosols in the atmosphere, which reflect sunlight and cause global dimming . After 1970, the increasing accumulation of greenhouse gases and controls on sulfur pollution led to

6533-470: The 1920s and 1930s, the Sierra Club functioned as a social and recreational society, conducting outings, maintaining trails and building huts and lodges in the Sierra. Preservation campaigns included a several-year effort to enlarge Sequoia National Park (achieved in 1926) and over three decades of work to protect and then preserve Kings Canyon National Park (established in 1940). Historian Stephen Fox notes, "In

6672-510: The 1930s most of the three thousand members were middle-aged Republicans." The New Deal brought many conservationists to the Democratic Party, and many Democrats entered the ranks of conservationists. Leading the generation of Young Turks who revitalized the Sierra Club after World War II were attorneys Richard Leonard and Bestor Robinson , nature photographer Ansel Adams , and David Brower . Adams sponsored Brower for membership in

6811-599: The 1950s, droughts and heat waves have appeared simultaneously with increasing frequency. Extremely wet or dry events within the monsoon period have increased in India and East Asia. Monsoonal precipitation over the Northern Hemisphere has increased since 1980. The rainfall rate and intensity of hurricanes and typhoons is likely increasing , and the geographic range likely expanding poleward in response to climate warming. Frequency of tropical cyclones has not increased as

6950-500: The 1980s, the terms global warming and climate change became more common, often being used interchangeably. Scientifically, global warming refers only to increased surface warming, while climate change describes both global warming and its effects on Earth's climate system , such as precipitation changes. Climate change can also be used more broadly to include changes to the climate that have happened throughout Earth's history. Global warming —used as early as 1975 —became

7089-440: The Arctic is forcing many species to relocate or become extinct . Even if efforts to minimize future warming are successful, some effects will continue for centuries. These include ocean heating , ocean acidification and sea level rise . Climate change threatens people with increased flooding , extreme heat, increased food and water scarcity, more disease, and economic loss . Human migration and conflict can also be

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7228-435: The Arctic is another major feedback, this reduces the reflectivity of the Earth's surface in the region and accelerates Arctic warming . This additional warming also contributes to permafrost thawing, which releases methane and CO 2 into the atmosphere. Around half of human-caused CO 2 emissions have been absorbed by land plants and by the oceans. This fraction is not static and if future CO 2 emissions decrease,

7367-542: The CO 2 released by the chemical reactions for making cement , steel , aluminum , and fertilizer . Methane emissions come from livestock , manure, rice cultivation , landfills, wastewater, and coal mining , as well as oil and gas extraction . Nitrous oxide emissions largely come from the microbial decomposition of fertilizer . While methane only lasts in the atmosphere for an average of 12 years, CO 2 lasts much longer. The Earth's surface absorbs CO 2 as part of

7506-469: The California legislature to give Yosemite Valley to the U.S. federal government, and preserving coastal redwood forests of California. Muir escorted President Theodore Roosevelt through Yosemite in 1903, and two years later the California legislature ceded Yosemite Valley and Mariposa Grove to the federal government. The Sierra Club won its first lobbying victory with the creation of the country's second national park, after Yellowstone in 1872. In

7645-604: The Earth will be able to absorb up to around 70%. If they increase substantially, it'll still absorb more carbon than now, but the overall fraction will decrease to below 40%. This is because climate change increases droughts and heat waves that eventually inhibit plant growth on land, and soils will release more carbon from dead plants when they are warmer . The rate at which oceans absorb atmospheric carbon will be lowered as they become more acidic and experience changes in thermohaline circulation and phytoplankton distribution. Uncertainty over feedbacks, particularly cloud cover,

7784-573: The Echo Park dam from the Colorado River project as approved in 1955. Recognition of the Sierra Club's role in the Echo Park dam victory boosted membership from 10,000 in 1956 to 15,000 in 1960. The Sierra Club was now truly a national conservation organization, and preservationists took the offensive with wilderness proposals. The club's Biennial Wilderness Conferences, launched in 1949 in concert with The Wilderness Society, became an important force in

7923-682: The Sierra Club Legal Defense Fund) helped establish the right of citizens to sue for environmental damages. The case ultimately forced the Walt Disney Company to drop its plans to develop an enormous ski resort in the Mineral King valley in California's Sierra Nevada Range. The lawsuit blocked any further development or private use of the land which has since been incorporated into the Sequoia National Park . In 1993,

8062-545: The Sierra Club has expressed opposition to power lines and said that hydropower projects disrupt animal habitats. The Sierra Club opposes dams it considers inappropriate, including some government-built dams in national parks. In the early 20th century, the organization fought against the damming and flooding of the Hetch Hetchy Valley in Yosemite National Park . Despite this lobbying, Congress authorized

8201-517: The Sierra Club opposed SB 827 , which would have permitted dense housing near major public transit stations in California. Most other environmental groups supported the legislation, as dense housing construction near public transit was estimated to substantially reduce car pollution and help California reach its emissions target. Ethan Elkind, director of the Climate Change and Business Program at UC-Berkeley and UCLA Schools of Law, called it “one of

8340-407: The Sierra Club set a goal to close half of all coal plants in the U.S. by 2017. American business magnate and former New York City mayor Michael Bloomberg donated $ 50 million to the Sierra Club's anti-coal work in 2011, and announced another $ 30 million gift to Sierra's Beyond Coal campaign in 2015. The Beyond Coal campaign says 187 coal plants have been closed since 2010. Other funders of

8479-525: The Sierra Club sued the Puerto Rican government for 18 renewable energy projects on more than 2,000 hectares of land. The Sierra Club argued that the land was ecologically sensitive and of high agricultural value. The Sierra Club said that building renewable energy projects on agricultural land was a "serious attack on the food security of Puerto Rico." A goal of the Sierra Club is to replace coal with other energy sources. Through its " Beyond Coal " campaign,

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8618-515: The Sierra Club would officially participate in the first civil disobedience action in its 120-year history as part of the ongoing protest calling on the Obama administration to reject the Keystone XL tar sands pipeline, stating, "We are watching a global crisis unfold before our eyes, and to stand aside and let it happen—even though we know how to stop it—would be unconscionable." On February 13, 2013, Brune

8757-570: The Sierra Club's anti-coal campaign include the William and Flora Hewlett Foundation and the John D. and Catherine T. MacArthur Foundation . The CEO of Chesapeake Energy , a natural gas company, donated $ 26 million to the Beyond Coal campaign between 2007 and 2010. The Sierra Club sued the Puerto Rico government in 2023 for its plans to build dozens of renewable energy projects. The Sierra Club said

8896-771: The Sierra Club, World Wildlife Fund , American Lung Association , as well as smaller state and community groups, such as the Maine Lobstermen's Association and the Friends of the Everglades . Earthjustice is a nonprofit organization, meaning the legal service they provide is free for their clients. Funding for the organization comes from donations. It does not receive any funding from corporations or governments. In 2021, Earthjustice made $ 154 million in total revenue and $ 100 million in total expenditures. As of 2021, Earthjustice has full-time staff of about 170 attorneys in 14 offices across

9035-507: The Sierra Nevada were made on Sierra Club outings. Sierra Club members were also early enthusiasts of rock climbing. In 1911, the first chapter was formed, Angeles, and it began conducting local excursions in the mountains surrounding Los Angeles and throughout the West. Steve Roper 's Fifty Classic Climbs of North America , sponsored and published by the Sierra Club, is still considered one of

9174-621: The United States, and 14 public-interest lobbyists based in Washington, D.C. They are involved in 630 active legal proceedings. The current president of Earthjustice is Abigail Dillen, an environmental attorney who first joined Earthjustice in 2000 and was previously Vice President of Litigation for Climate and Energy. Earthjustice's work is divided into three key goal areas: Earthjustice also partners with organizations from other regions, including Latin America , Russia , Japan , and China to promote

9313-451: The World , with color photographs by Eliot Porter . These coffee-table books, published by their Sierra Club Books division, introduced the Sierra Club to a wider audience. Fifty thousand copies were sold in the first four years, and by 1960 sales exceeded $ 10 million. Soon Brower was publishing two new titles a year in the Exhibit Format series, but not all did as well as In Wildness. Although

9452-441: The absorption of sunlight, it also increases melting and sea-level rise. Limiting new black carbon deposits in the Arctic could reduce global warming by 0.2 °C by 2050. The effect of decreasing sulfur content of fuel oil for ships since 2020 is estimated to cause an additional 0.05 °C increase in global mean temperature by 2050. As the Sun is the Earth's primary energy source, changes in incoming sunlight directly affect

9591-724: The administration of President Jimmy Carter . Efforts of the Sierra Club and others—including Black community organizers who fought against destructive "urban renewal" projects—led to passage of the National Environmental Policy Act and the Water Pollution Control Act . The Sierra Club formed a political committee and made its first presidential endorsement in 1984 in support of Walter Mondale 's unsuccessful campaign to unseat Ronald Reagan . McCloskey resigned as executive director in 1985 after 16 + 1 ⁄ 2 years (the same length of time Brower had led

9730-411: The atmosphere , for instance by increasing forest cover and farming with methods that capture carbon in soil . Before the 1980s it was unclear whether the warming effect of increased greenhouse gases was stronger than the cooling effect of airborne particulates in air pollution . Scientists used the term inadvertent climate modification to refer to human impacts on the climate at this time. In

9869-452: The atmosphere. volcanic CO 2 emissions are more persistent, but they are equivalent to less than 1% of current human-caused CO 2 emissions. Volcanic activity still represents the single largest natural impact (forcing) on temperature in the industrial era. Yet, like the other natural forcings, it has had negligible impacts on global temperature trends since the Industrial Revolution. The climate system's response to an initial forcing

10008-669: The battle against the Echo Park Dam in Dinosaur National Monument in Utah , which had been announced by the Bureau of Reclamation in 1950. Brower led the fight, marshaling support from other conservation groups. Brower's background in publishing proved decisive; with the help of publisher Alfred Knopf, This Is Dinosaur was rushed into press. Invoking the specter of Hetch Hetchy, conservationists effectively lobbied Congress, which deleted

10147-454: The biggest threats to global health in the 21st century. Scientists have warned about the irreversible harms it poses. Extreme weather events affect public health, and food and water security . Temperature extremes lead to increased illness and death. Climate change increases the intensity and frequency of extreme weather events. It can affect transmission of infectious diseases , such as dengue fever and malaria . According to

10286-422: The board of directors voted to support PG&E's plan for the power plant. A membership referendum in 1967 upheld the board's decision. But Brower concluded that nuclear power at any location was a mistake, and he voiced his opposition to the plant, contrary to the club's official policy. As pro- and anti-Brower factions polarized, the annual election of new directors reflected the conflict. Brower's supporters won

10425-471: The books were successful in introducing the public to wilderness preservation and the Sierra Club, they lost money for the organization, some $ 60,000 a year after 1964. Financial management became a matter of contention between Brower and his board of directors. The Sierra Club's most publicized crusade of the 1960s was the effort to stop the Bureau of Reclamation from building two dams that would flood portions of

10564-583: The campaign that secured passage of the Wilderness Act in 1964, marking the first time that public lands (9.1 million acres) were permanently protected from development. Grand Teton National Park and Olympic National Park were also enlarged at the Sierra Club's urging. In 1960, Brower launched the Exhibit Format book series with This Is the American Earth , and in 1962, In Wildness Is the Preservation of

10703-620: The campaigns to save the Grand Canyon and establish Redwoods National Park and North Cascades National Park . During the 1970s, McCloskey led the club's legislative activity—preserving Alaskan lands and eastern wilderness areas, and supporting the new environmental agenda: the Toxic Substances Control Act of 1976, the Clean Air Act amendments, and the Surface Mining Control and Reclamation Act of 1977, passed during

10842-540: The carbon cycle, such as the fertilizing effect of CO 2 on plant growth. Feedbacks are expected to trend in a positive direction as greenhouse gas emissions continue, raising climate sensitivity. These feedback processes alter the pace of global warming. For instance, warmer air can hold more moisture in the form of water vapour , which is itself a potent greenhouse gas. Warmer air can also make clouds higher and thinner, and therefore more insulating, increasing climate warming. The reduction of snow cover and sea ice in

10981-604: The ceiling?" The ads generated a storm of protest to the Congress, prompting the Internal Revenue Service to announce it was suspending the Sierra Club's 501(c)(3) status pending an investigation. The board had taken the precaution of setting up the Sierra Club Foundation as a (c)(3) organization in 1960 for endowments and contributions for educational and other non-lobbying activities. Even so, contributions to

11120-543: The climate cycled through ice ages . One of the hotter periods was the Last Interglacial , around 125,000 years ago, where temperatures were between 0.5 °C and 1.5 °C warmer than before the start of global warming. This period saw sea levels 5 to 10 metres higher than today. The most recent glacial maximum 20,000 years ago was some 5–7 °C colder. This period has sea levels that were over 125 metres (410 ft) lower than today. Temperatures stabilized in

11259-447: The club dropped off, aggravating its annual operating deficits. Membership, however, climbed sharply in response to the investigation into the legitimacy of the society's tax status by the IRS from 30,000 in 1965 to 57,000 in 1967 and 75,000 in 1969. The victory over the dam projects and challenges from the IRS did not come without costs. To make up for the power that would have been produced by

11398-413: The club had played the leading role blocking PG&E's nuclear power plant proposed for Bodega Bay, California , in the early 1960s, that case had been built around the local environmental impact and earthquake danger from the nearby San Andreas Fault , not from opposition to nuclear power itself. In exchange for moving the new proposed site from the environmentally sensitive Nipomo Dunes to Diablo Canyon,

11537-472: The club's legislative director, was named executive director in 1992. In the 1990s, club members Jim Bensman, Roger Clarke, David Dilworth, Chad Hanson and David Orr along with about 2,000 members formed the John Muir Sierrans (JMS), an internal caucus, to promote changes to club positions. They favored a zero-cut forest policy on public lands and, a few years later, decommissioning Glen Canyon Dam . JMS

11676-417: The club, Brower was elected to the board of directors for a term from 1983 to 1988, and again from 1995 to 2000. Brower resigned from the board in 2000. Michael McCloskey, hired by Brower in 1961 as the club's first northwest field representative, became the club's second executive director in 1969. An administrator attentive to detail, McCloskey had set up the club's conservation department in 1965 and guided

11815-642: The club, and he was appointed to the editorial board of the Sierra Club Bulletin. After World War II Brower returned to his job with the University of California Press, and began editing the Sierra Club Bulletin in 1946. In 1950, the Sierra Club had some 7,000 members, mostly on the West Coast. That year the Atlantic chapter became the first formed outside California. An active volunteer board of directors ran

11954-461: The construction of O'Shaughnessy Dam on the Tuolumne River . The Sierra Club continues to support removal of the dam. The Sierra Club advocates the decommissioning of Glen Canyon Dam and the draining of Lake Powell . The club also supports removal, breaching or decommissioning of many other dams, including four dams on the lower Snake River in eastern Washington . The Sierra Club opposes

12093-469: The contract. In November 2011, Sierra Club chairman Carl Pope stepped down amid discontent about the Clorox deal and other issues. Between 2007 and 2010, the Sierra Club accepted over $ 25 million in donations from the gas industry, mostly from Aubrey McClendon , CEO of Chesapeake Energy , a large gas drilling company involved in fracking . In January 2013, executive director Michael Brune announced that

12232-420: The core advocacy areas of the Sierra Club. Uniquely for a progressive organization, the Sierra Club has strong grassroots organization in rural areas, with much activity focused on ensuring equitable and environmentally-friendly use of public lands. This is particularly accentuated by the fact that the club attracts many people who primarily join the club for recreation and use of public land for hiking. In 2023,

12371-406: The country, Sierra Club also organizes hiking tours. Sierra Club's website has a "hiking near me" function. Section " Sierra Club Near You " shows all the upcoming trips in nearby area. The historic High Trips, sometimes large expeditions with more than a hundred participants and crew, have given way to smaller and more numerous excursions held across the United States and abroad. These outings form

12510-530: The court noted that in 40 years of such sonar training there had not been a documented case of injury or death to a marine mammal that could be directly attributed to the sonar. In 2017, the Ninth Circuit Court of Appeals rejected a suit against the EPA with the goal of banning the pesticide chlorpyrifos . The court ruled that an environmental coalition, including Earthjustice, failed to follow procedure by filing

12649-668: The current interglacial period beginning 11,700 years ago . This period also saw the start of agriculture. Historical patterns of warming and cooling, like the Medieval Warm Period and the Little Ice Age , did not occur at the same time across different regions. Temperatures may have reached as high as those of the late 20th century in a limited set of regions. Climate information for that period comes from climate proxies , such as trees and ice cores . Around 1850 thermometer records began to provide global coverage. Between

12788-545: The dam had a friend in the White House. The bill to dam Hetch Hetchy passed Congress in 1913, and so the Sierra Club lost its first major battle. In retaliation, the club supported creation of the National Park Service in 1916, to remove the parks from Forest Service oversight. Stephen Mather , a Club member from Chicago and an opponent of the Hetch Hetchy dam, became the first National Park Service director. During

12927-403: The dam, given its popularity with the people of San Francisco (a referendum in 1908 confirmed a seven-to-one majority in favor of the dam and municipal water). Muir and attorney William Edward Colby began a national campaign against the dam, attracting the support of many eastern conservationists. With the 1912 election of U.S. President Woodrow Wilson , who carried San Francisco, supporters of

13066-494: The dams, the Sierra Club actually advocated for coal power plants. The result of the campaign and its trade-off was, in the words of historian Andrew Needham, that "the Grand Canyon became protected, sacred space," while "the Navajo Reservation"—which housed some of the main power plants picking up the slack—"became increasingly industrial." Despite the club's success in blocking plans for the Grand Canyon dams and weathering

13205-568: The definitive rock climbing guidebooks in the United States. The Wilderness Travel Course is a basic mountaineering class that is administered by the Sierra Club. In World War II , a number of Sierra Club leaders joined the 10th Mountain Division . Among them was David R. Brower , who managed the High Trip program from 1947 to 1954, while serving as a major in the Army Reserve. In many areas of

13344-403: The degree of warming future emissions will cause when accounting for the strength of climate feedbacks . Models also predict the circulation of the oceans, the annual cycle of the seasons, and the flows of carbon between the land surface and the atmosphere. The physical realism of models is tested by examining their ability to simulate current or past climates. Past models have underestimated

13483-427: The destroyed trees release CO 2 , and are not replaced by new trees, removing that carbon sink . Between 2001 and 2018, 27% of deforestation was from permanent clearing to enable agricultural expansion for crops and livestock. Another 24% has been lost to temporary clearing under the shifting cultivation agricultural systems. 26% was due to logging for wood and derived products, and wildfires have accounted for

13622-540: The development of environmental law in their respective countries. Every year, Earthjustice submits a country-by-country report on Human Rights and the Environment to the United Nations . Earthjustice has been a critical player in a number of important, precedent-setting cases regarding environmental protection in the United States. In the 1972 Supreme Court case Sierra Club v. Morton , Earthjustice (then known as

13761-401: The distribution of heat and precipitation around the globe. The World Meteorological Organization estimates there is an 80% chance that global temperatures will exceed 1.5 °C warming for at least one year between 2024 and 2028. The chance of the 5-year average being above 1.5 °C is almost half. The IPCC expects the 20-year average global temperature to exceed +1.5 °C in

13900-444: The dominant direct influence on temperature from land use change. Thus, land use change to date is estimated to have a slight cooling effect. Air pollution, in the form of aerosols, affects the climate on a large scale. Aerosols scatter and absorb solar radiation. From 1961 to 1990, a gradual reduction in the amount of sunlight reaching the Earth's surface was observed. This phenomenon is popularly known as global dimming , and

14039-399: The early eugenics movement in the United States . Michael Brune, writing as the executive director of the Sierra Club, disavowed founder John Muir in the summer of 2020, but some board members said Brune's characterization of Muir was not representative of the organization. In January 2023, former NAACP president Ben Jealous became the organization's new executive director, making him

14178-610: The early 2030s. The IPCC Sixth Assessment Report (2021) included projections that by 2100 global warming is very likely to reach 1.0–1.8 °C under a scenario with very low emissions of greenhouse gases , 2.1–3.5 °C under an intermediate emissions scenario , or 3.3–5.7 °C under a very high emissions scenario . The warming will continue past 2100 in the intermediate and high emission scenarios, with future projections of global surface temperatures by year 2300 being similar to millions of years ago. The remaining carbon budget for staying beneath certain temperature increases

14317-440: The earth; To practice and promote the responsible use of the earth's ecosystems and resources; To educate and enlist humanity to protect and restore the quality of the natural and human environment; and to use all lawful means to carry out these objectives." The Sierra Club is governed by a 15-member board of directors. Each year, five directors are elected to three-year terms, and all club members are eligible to vote. A president

14456-430: The entire atmosphere—is ruled out because only the lower atmosphere has warmed. Atmospheric aerosols produce a smaller, cooling effect. Other drivers, such as changes in albedo , are less impactful. Greenhouse gases are transparent to sunlight , and thus allow it to pass through the atmosphere to heat the Earth's surface. The Earth radiates it as heat , and greenhouse gases absorb a portion of it. This absorption slows

14595-564: The first African American to fulfill the role. In 2024, Sierra Club listed nuclear power as one of the sources included in Clean Energy Standard (CES). In 1901, William Colby organized the first Sierra Club excursion to Yosemite Valley . The annual High Trips were led by mountaineers such as Francis P. Farquhar , Joseph Nisbet LeConte , Norman Clyde , Walter A. Starr, Jr. , Jules Eichorn , Glen Dawson , Ansel Adams , and David R. Brower . A number of first ascents in

14734-465: The first decade of the 1900s, the Sierra Club became embroiled in the Hetch Hetchy Reservoir battle that divided preservationists from "resource management" conservationists. In the late 19th century, the city of San Francisco was rapidly outgrowing its limited water supply, which depended on intermittent local springs and streams. In 1890, San Francisco mayor James D. Phelan proposed to build

14873-428: The first successful nonprofit uses of Foursquare. This success was featured in media outlets such as The New York Times , Mashable , and MacLife magazine, as well as books such as Carmine Gallo's The Power of Foursquare . In 2001, Worth magazine, aimed at high-income Americans, named Earthjustice as one of America's 100 best charities. Since April 1, 2009, Charity Navigator has given Earthjustice 4 stars,

15012-592: The global climate system has grown with only brief pauses since at least 1970, and over 90% of this extra energy has been stored in the ocean . The rest has heated the atmosphere , melted ice, and warmed the continents. The Northern Hemisphere and the North Pole have warmed much faster than the South Pole and Southern Hemisphere . The Northern Hemisphere not only has much more land, but also more seasonal snow cover and sea ice . As these surfaces flip from reflecting

15151-537: The importation of energy from Quebec's hydropower plants to New York, arguing that importing excess energy by the Quebec plants will cause environmental damage and lead to fewer in-state New York renewable energy projects. Some chapters of the Sierra Club have lobbied against solar power projects, whereas other chapters have defended solar power projects. The Sierra Club opposed the Battle Born Solar Project,

15290-516: The largest solar project in the U.S., citing its potential impact on desert tortoise habitats. The Sierra Club sued the federal government to stop the 663.5-megawatt Calico solar station in the Mojave Desert in California, saying it would imperil protected wildlife. In response to proposed reforms to streamline the permitting process for environmental projects amid concerns that environmental permitting reviews were delaying and blocking projects with

15429-572: The last 14 million years. Concentrations of methane are far higher than they were over the last 800,000 years. Global human-caused greenhouse gas emissions in 2019 were equivalent to 59 billion tonnes of CO 2 . Of these emissions, 75% was CO 2 , 18% was methane , 4% was nitrous oxide, and 2% was fluorinated gases . CO 2 emissions primarily come from burning fossil fuels to provide energy for transport , manufacturing, heating , and electricity. Additional CO 2 emissions come from deforestation and industrial processes , which include

15568-436: The last two decades. CO 2 is only removed from the atmosphere for the long term when it is stored in the Earth's crust, which is a process that can take millions of years to complete. Around 30% of Earth's land area is largely unusable for humans ( glaciers , deserts , etc.), 26% is forests , 10% is shrubland and 34% is agricultural land . Deforestation is the main land use change contributor to global warming, as

15707-441: The last: internal climate variability processes can make any year 0.2 °C warmer or colder than the average. From 1998 to 2013, negative phases of two such processes, Pacific Decadal Oscillation (PDO) and Atlantic Multidecadal Oscillation (AMO) caused a short slower period of warming called the " global warming hiatus ". After the "hiatus", the opposite occurred, with years like 2023 exhibiting temperatures well above even

15846-608: The lower atmosphere. Carbon dioxide , the primary greenhouse gas driving global warming, has grown by about 50% and is at levels not seen for millions of years. Climate change has an increasingly large impact on the environment . Deserts are expanding , while heat waves and wildfires are becoming more common. Amplified warming in the Arctic has contributed to thawing permafrost , retreat of glaciers and sea ice decline . Higher temperatures are also causing more intense storms , droughts, and other weather extremes . Rapid environmental change in mountains , coral reefs , and

15985-413: The more popular term after NASA climate scientist James Hansen used it in his 1988 testimony in the U.S. Senate . Since the 2000s, climate change has increased usage. Various scientists, politicians and media may use the terms climate crisis or climate emergency to talk about climate change, and may use the term global heating instead of global warming . Over the last few million years

16124-714: The most important climate bills in California.” The Sierra Club argued the bill sought to take away the sacrosanct right of localities "to make smart local decisions about development." In 2023, the Sierra Club lobbied against AB 1633, which prevents NIMBY abuse of the California Environmental Quality Act to block new housing developments that already comply with local and state land use and environmental regulations. Climate change Present-day climate change includes both global warming —the ongoing increase in global average temperature —and its wider effects on Earth's climate . Climate change in

16263-464: The organization (still then known as the Sierra Club Legal Defense Fund) filed a lawsuit to block the development of the New World gold-silver-copper mine that was planned to be sited about four miles from the northeast entrance to Yellowstone National Park . The lawsuit was a victory in that the district judge ruled that not only could the subsidiary mining company (in this case Crown Butte Mines, Inc.,

16402-603: The organization's new executive director, making him the first African American to fulfill the role. The Sierra Club is organized on both a national and state level with chapters named for the 50 states and two U.S. territories (Puerto Rico and Washington D.C.) California is the lone state to have numerous chapters named for California counties. The club chapters allow for regional groups and committees, some of which have many thousands of members. These chapters further allow for special interest sections (e.g. camera, outings), committees (conservation and political), and task forces on

16541-532: The organization), and assumed the title of chairman, becoming the club's senior strategist, devoting his time to conservation policy rather than budget planning and administration. After a two-year interlude with Douglas Wheeler, whose Republican credentials were disconcerting to liberal members, the club hired Michael Fischer, the former head of the California Coastal Commission , who served as executive director from 1987 to 1992. Carl Pope , formerly

16680-465: The organization, assisted by a small clerical staff. Brower was appointed the first executive director in 1952, and the club began to catch up with major conservation organizations such as the National Audubon Society , National Wildlife Federation , The Wilderness Society , and Izaak Walton League , which had long had professional staff. The Sierra Club secured its national reputation in

16819-502: The oversight group's highest rating. In December 2014, the organization was recognized for its tagline "Because the earth needs a good lawyer", which was chosen in a 2009 online contest as one of the best nonprofit taglines out of 1,702 entries. Earthjustice has come under criticism for actions that are described as radical or counterproductive. Kevin Mooney of the right-leaning Capital Research Center writes that Earthjustice has represented

16958-450: The projects were planned to be built on lands that were ecologically sensitive and of high agricultural value. At the time, Puerto Rico was overwhelmingly dependent on fossil fuels for its energy use, while only 2% of its energy came from renewable sources. The Sierra Club is "unequivocally opposed" to nuclear power. The Sierra Club has lobbied against hydropower projects and large-scale dams. In lobbying against hydropower projects,

17097-619: The rate at which heat escapes into space, trapping heat near the Earth's surface and warming it over time. While water vapour (≈50%) and clouds (≈25%) are the biggest contributors to the greenhouse effect, they primarily change as a function of temperature and are therefore mostly considered to be feedbacks that change climate sensitivity . On the other hand, concentrations of gases such as CO 2 (≈20%), tropospheric ozone , CFCs and nitrous oxide are added or removed independently from temperature, and are therefore considered to be external forcings that change global temperatures. Before

17236-522: The rate of Arctic shrinkage and underestimated the rate of precipitation increase. Sea level rise since 1990 was underestimated in older models, but more recent models agree well with observations. The 2017 United States-published National Climate Assessment notes that "climate models may still be underestimating or missing relevant feedback processes". Additionally, climate models may be unable to adequately predict short-term regional climatic shifts. A subset of climate models add societal factors to

17375-613: The rate of yield growth . Fisheries have been negatively affected in multiple regions. While agricultural productivity has been positively affected in some high latitude areas, mid- and low-latitude areas have been negatively affected. According to the World Economic Forum, an increase in drought in certain regions could cause 3.2 million deaths from malnutrition by 2050 and stunting in children. With 2 °C warming, global livestock headcounts could decline by 7–10% by 2050, as less animal feed will be available. If

17514-405: The recent average. This is why the temperature change is defined in terms of a 20-year average, which reduces the noise of hot and cold years and decadal climate patterns, and detects the long-term signal. A wide range of other observations reinforce the evidence of warming. The upper atmosphere is cooling, because greenhouse gases are trapping heat near the Earth's surface, and so less heat

17653-411: The release of chemical compounds that influence clouds, and by changing wind patterns. In tropic and temperate areas the net effect is to produce significant warming, and forest restoration can make local temperatures cooler. At latitudes closer to the poles, there is a cooling effect as forest is replaced by snow-covered (and more reflective) plains. Globally, these increases in surface albedo have been

17792-476: The remaining 23%. Some forests have not been fully cleared, but were already degraded by these impacts. Restoring these forests also recovers their potential as a carbon sink. Local vegetation cover impacts how much of the sunlight gets reflected back into space ( albedo ), and how much heat is lost by evaporation . For instance, the change from a dark forest to grassland makes the surface lighter, causing it to reflect more sunlight. Deforestation can also modify

17931-583: The sea levels by at least 3.3 m (10 ft 10 in) over approximately 2000 years. Recent warming has driven many terrestrial and freshwater species poleward and towards higher altitudes . For instance, the range of hundreds of North American birds has shifted northward at an average rate of 1.5 km/year over the past 55 years. Higher atmospheric CO 2 levels and an extended growing season have resulted in global greening. However, heatwaves and drought have reduced ecosystem productivity in some regions. The future balance of these opposing effects

18070-432: The suit with the court before filing their appeal of a 2007 EPA ruling allowing the pesticide. However, on August 9, 2018, the court ruled that chlorpyrifos must be banned within 60 days from that date In 2010, Earthjustice launched a fundraising campaign using the location-based social networking app Foursquare . The ad campaign, which ran in billboards in San Francisco's BART system, gained national recognition as one of

18209-414: The transition from 501(c)(3) to 501(c)(4) status, tension grew over finances between Brower and the board of directors. The club's annual deficits rose from $ 100,000 in 1967 and 1968 to some $ 200,000 in 1969. Another conflict occurred over the club's policy toward the nuclear power plant to be constructed by Pacific Gas and Electric (PG&E) at Diablo Canyon near San Luis Obispo, California . Although

18348-523: The use of coal , hydropower , and nuclear power . Its political endorsements generally favor liberal and progressive candidates in elections. In addition to political advocacy, the Sierra Club organizes outdoor recreation activities, and has historically been a notable organization for mountaineering and rock climbing in the United States. Members of the Sierra Club pioneered the Yosemite Decimal System of climbing, and were responsible for

18487-438: The world. Impacts can be observed on all continents and ocean regions, with low-latitude, less developed areas facing the greatest risk. Continued warming has potentially "severe, pervasive and irreversible impacts" for people and ecosystems. The risks are unevenly distributed, but are generally greater for disadvantaged people in developing and developed countries. The World Health Organization calls climate change one of

18626-532: The young botany professor, Willis Linn Jepson from the University of California, Berkeley helped Muir and attorney Warren Olney launched the new organization modeled after the eastern Appalachian Mountain Club . The charter members of the Sierra Club elected Muir president, an office he held until his death in 1914. The first goals of the club included establishing Glacier and Mount Rainier national parks, convincing

18765-474: Was arrested along with forty-eight people, including civil rights leader Julian Bond and NASA climate scientist James Hansen . In May 2015, the Sierra Club appointed its first black president of the board of directors, Aaron Mair . The Sierra Club endorsed Hillary Clinton in the 2016 U.S. presidential election, and Joe Biden in the 2020 U.S. presidential election , citing its opposition to Donald Trump 's environmental deregulation. In 2020, in wake of

18904-524: Was sending more energy to Earth, but instead, it has been cooling. This is consistent with greenhouse gases preventing heat from leaving the Earth's atmosphere. Explosive volcanic eruptions can release gases, dust and ash that partially block sunlight and reduce temperatures, or they can send water vapour into the atmosphere, which adds to greenhouse gases and increases temperatures. These impacts on temperature only last for several years, because both water vapour and volcanic material have low persistence in

19043-480: Was successful in changing club positions on both counts. In 2008, several Sierra Club officers quit in protest after the Sierra Club agreed to promote products by Clorox , which had been named one of a "dangerous dozen" chemical companies by the Public Interest Research Group in 2004. According to Carl Pope, the Sierra Club chairman, the deal brought the club $ 1.3 million over the four-year term of

19182-507: Was the first Supreme Court case to ever address the issue of climate change . Other suits have been less successful: In 2008, the Supreme Court ruled in favor of the US Navy in a suit brought in part by Earthjustice, which ordered Navy personnel to stop the use of certain types of sonar if a marine mammal such as a dolphin or whale was sighted within 2,200 yards. Among other details,

19321-427: Was the first time a government agency had formally embraced the principle of " environmental justice " in its decision-making. In the 2006 Supreme Court case Massachusetts v. Environmental Protection Agency , Earthjustice attorneys helped a coalition of state governments and conservation groups force the U.S. Environmental Protection Agency (EPA) to fight global warming by limiting greenhouse gas emissions . It

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