111-514: The City of Unley is a local government area in the Adelaide metropolitan region. It is located directly south of the Adelaide city centre . The Corporate Town of Unley was created in 1871, when 2,000 signatories to a petition from residents of the several towns of Unley, Parkside, Black Forest, Goodwood and Fullarton requested the Governor allow them to form their own municipality and thus sever from
222-577: A unitary authority , but the Australian Bureau of Statistics refers to the whole of the ACT as an unincorporated area. The ACT Government directorate Transport Canberra & City Services handles responsibilities that are under the purview of local government in other parts of Australia, such as local road maintenance, libraries and waste collection. Many Canberra districts have community organisations called "community councils", but these are not part of
333-600: A carbon-neutral date brought forward from 2030 to 2023. Councillors who voted in favour of the December 2023 carbon neutral date anticipated buying high quality carbon offsets with co-benefits of indigenous employment and biodiversity. Following the South Australian local government elections in November, 2022, Michael Hewitson was re-elected as Mayor. Six new ward Councillors were elected, and six ward Councillors were returned. At
444-416: A climate emergency, nor banned fossil fuel advertising on property it owns. The City of Unley's CO 2 corporate emissions represent about 1% of total community-wide emissions. Its total corporate emissions for 2020 were estimated as 3,600 tonnes CO 2 equiv, comprising 1,700 tonnes CO 2 equiv Scope 1 and 2 emissions, and 1,900 tonnes CO 2 equiv Scope 3 emissions. To address its corporate emissions,
555-635: 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
666-490: A formal strategy or a target carbon-neutral date for community-wide emissions but it is encouraging the reduction of waste and transport emissions. It supports and encourages its residents to move food waste into organic bins for composting rather than landfill, and by providing more investment in cycleways and pedestrian friendly streetscapes. As part of its commitment to the Global Covenant of Mayors for Climate and Energy,
777-586: A geographic or historical interpretation. The council board members are generally known as councillors , and the head councillor is called the mayor . As of August 2016, there were 547 local councils in Australia. Despite the single tier of local governance in Australia, there are a number of extensive regions with relatively low populations that are not a part of any established LGA. Powers of local governments in these unincorporated areas may be exercised by special-purpose governing bodies established outside of
888-535: A larger workload. The growth of the Regional Organisations of Councils has also been a factor in local government reform in Australia. In 1995, there were 50 such agreements across the country. A 2002 study identified 55 ROCs with the largest involving 18 councils. Local government powers are determined by state governments, and states have primary responsibility for funding and exclusive responsibility for supervision of local councils. Local government
999-532: 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
1110-412: 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
1221-408: 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
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#17328632086211332-457: 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
1443-474: 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
1554-403: A shift from 'services to property' towards 'services to people'. Community expectations of local government in Australia have risen in the 21st century partly as a result of wider participation in decision-making and transparent management practices. Recent years have seen some State governments devolving additional powers onto LGAs. In Queensland and Western Australia LGAs have been granted
1665-417: 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
1776-538: 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
1887-519: 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,
1998-503: 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 the lower atmosphere. Carbon dioxide , the primary greenhouse gas driving global warming, has grown by about 50% and
2109-557: 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
2220-488: 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
2331-711: 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
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#17328632086212442-399: 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
2553-517: Is mentioned in the annotated Australian constitution, as a department of the State Governments, and they are mentioned in the constitutions of each of the six states. Under the Constitution, the federal government cannot provide funding directly to local governments; a 1974 referendum sought to amend the Constitution to authorise the federal government to directly fund local governments, but it
2664-447: Is part of a local government area. Unincorporated areas are often in remote locations, cover vast areas, or have very small populations. Queensland and Tasmania are entirely partitioned into LGAs and have no unincorporated areas. The Australian Capital Territory (ACT) has no municipalities. The ACT government is responsible for both state-level and local-level matters. In some countries, such an arrangement would be referred to as
2775-450: 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
2886-444: 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
2997-516: 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
3108-504: Is subject to the exclusive jurisdiction of the state/territory it belongs to. The functions and practices of local councils are mostly centered around managing public services and land uses at the community level, and are similar throughout Australia, but can vary to some degree between jurisdictions. State departments oversee the activities of local councils and may intervene in their affairs when needed, subject to relevant legislation. For more details in each state and territory, see
3219-631: Is the City of Brisbane , the most populous LGA in the country, which administers a significant part of the Brisbane metropolitan area . In most cases, when a city's population statistics are used, it is the statistical division population rather than the local government area. The following table provides a summary of local government areas by states and territories by local government area types as of December 2023: The Australian Classification of Local Governments (ACLG) categorises local governing authorities using
3330-407: 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
3441-572: Is the third level of government in Australia , administered with limited autonomy under the states and territories , and in turn beneath the federal government . Local government is not mentioned in the Constitution of Australia , and two referendums in 1974 and 1988 to alter the Constitution relating to local government were unsuccessful. Every state/territory government recognises local government in its own respective constitution . Unlike
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3552-417: 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
3663-507: 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
3774-677: The District Council of Mitcham . The first town hall was built in 1880. It became the third municipality in the State to gain city status in 1906 (after the Cities of Adelaide and Port Adelaide), becoming the current City of Unley. Located on traditional lands of the Kaurna people, the City of Unley is rich in history, character and atmosphere, and centrally located only minutes from Adelaide's city centre. In 2011,
3885-657: 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
3996-568: 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
4107-835: 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
4218-626: 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
4329-639: The Local Government Act does not mandate adopting a designation, some local government areas are legally known simply as "council", such as Port Macquarie-Hastings Council , Inner West Council and Federation Council . Some rural areas in South Australia are known as "district council", and all the LGAs in Tasmania that were previously municipalities have been renamed "council". Almost all local councils have
4440-565: The Outback Communities Authority . Victoria has a number of unincorporated areas which are not part of any LGA: Western Australia has two unincorporated areas: 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 a broader sense also includes previous long-term changes to Earth's climate. The current rise in global temperatures
4551-703: The Pastoral Unincorporated Area in South Australia . Local governments are subdivisions of the six federated states as well as the Northern Territory . The Australian Capital Territory has no separate local government, and municipal functions in Canberra and the surrounding regions (normally performed by local governments in other states) are performed by the ACT territorial government. The Australian Bureau of Statistics (ABS), however, considers
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4662-759: The Top End region, the Northern Territory Rates Act Area and Darwin Waterfront Precinct within Darwin , Nhulunbuy on the Gove Peninsula , Alyangula on Groote Eylandt , and Yulara in Central Australia . In South Australia , 63% of the state's area is unincorporated. Residents in this area – less than 0.2% of the state's population – receive municipal services provided by a state agency,
4773-474: The United Nations (FAO) and Arbor Day Foundation , along with the City of Burnside and the City of Mitcham , which as of July 2020 are the only three in Australia. In 2020 the City of Unley joined the Global Covenant of Mayors for Climate and Energy and pledged to measure its GHG emissions, set emission targets, and develop a plan to support emission reductions. However, the City of Unley hasn't declared
4884-509: 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
4995-414: 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
5106-402: 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
5217-971: 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
5328-432: 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
5439-405: 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
5550-599: 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
5661-500: 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
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#17328632086215772-440: 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
5883-435: 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,
5994-487: The CEP acknowledges that to become carbon neutral the City of Unley must eventually purchase carbon offsets for its Scope 3 emissions. In mid-2021 a local community group, Unley Voices for Climate Action (UVCA), made a detailed submission to Council, signed by more than 70 residents, arguing for a more ambitious plan including an earlier carbon-neutral date. In September 2021 Council approved its Climate and Energy Plan which included
6105-542: 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
6216-551: The City of Unley Council meeting on 27 February 2023, a majority of Councillors voted in favour of the motion by new Liberal Party councillor, Jack Gaffey, to amend Council's Climate Change Policy. The amendment reverts the target carbon-neutral date of Council's corporate emissions from December, 2023 to December, 2030 by bringing forward carbon abatement measures specified in the CEP. Funds which were allocated to purchase accredited carbon offsets starting in December, 2023 will instead be spent on accelerating carbon abatement measures with
6327-678: The City of Unley developed a draft Climate and Energy Plan (CEP) that proposed attaining carbon neutrality by 2030. To achieve this goal the City of Unley's intends: staged adoption of electric vehicles; an electrification strategy to progressively switch from gas to electricity for space and water heating; more solar PV installations including at community centres; continued energy efficiency upgrades including LED lighting and building upgrades; and sustainable procurement improvements aimed at supporting local low-carbon industry suppliers. These measures will reduce Scope 1 and 2 emissions while procurement policies will work to reduce Scope 3 emissions. However,
6438-814: The City of Unley wanted to understand the breadth of community's views on climate change. As such, focus groups were used to support hearing a spectrum of views, rather than just the strong community voices for or against climate change action. A total of 43 residents in 5 community focus groups across Council wards took part. The most common responses to the question: " How can the community reduce its emissions ?" were: • Retain green spaces and trees and plant more • Drive less – ride walk, catch public transport, or use electric vehicles • Use less energy at home • Create less waste and recycle better • Install household solar generation and storage • Build sustainable houses • Use consumer and citizen influence • Change attitudes of those around you The most common responses to
6549-418: The City of Unley will need to set a community-wide emissions reduction goal. In 2022, the City of Unley commissioned market research surveys using focus groups to better understand community views on climate change , barriers to community emissions reduction, and to gather ideas for how Council can support community emissions reduction. To help guide future work to support reduction of community-wide emissions,
6660-604: 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,
6771-441: 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
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#17328632086216882-469: The amount to be determined during the Annual Business Plan and Budget process. The outcome of the 27 February 2023 Council meeting shifts the purchase of carbon offsets from December, 2023 back to December, 2030. The remaining 99% of community-wide emissions originate from residents and businesses comprising: transport (45%), electricity (30%), gas (20%) and waste (5%). The City of Unley doesn't have
6993-411: 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
7104-452: 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
7215-454: 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
7326-540: 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
7437-543: 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
7548-572: The community about how to reduce their environmental footprint • Improve development outcomes through assessment and advocacy for policy reform • Provide grants, incentives and rebates for greening and sustainability improvements • Lead by example with technology adoption The council, and the councillors' registered interests, as of December 2022 are: Sources: 34°57′S 138°36′E / 34.950°S 138.600°E / -34.950; 138.600 Local government in Australia [REDACTED] [REDACTED] Local government
7659-668: 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
7770-403: 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
7881-427: 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
7992-401: 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
8103-444: 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
8214-610: 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
8325-450: The entire ACT as an " unincorporated " local government area, even though it is technically a state-level administrative region . Although all essentially identical in functions and jurisdictions, Australian local governments have a variety of different titles. The term "local government area" (LGA) is used by the ABS to collectively refer to all local government administrative zones regardless of
8436-430: 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
8547-504: The first half of the 20th century was the provision of physical infrastructure such as roads, bridges and sewerage. From the 1970s the emphasis changed to community facilities such as libraries and parks, maintenance of local roads, town planning and development approvals, and local services such as waste disposal. Child care, tourism and urban renewal were also beginning to be part of local governments' role. These are financed by collection of local land taxes known as "rates", and grants from
8658-448: The first time. Significant reforms took place in the 1980s and 1990s in which state governments used metrics and efficiency analysis developed within the private sector in the local government arena. Each state conducted an inquiry into the benefits of council amalgamations during the 1990s. In the early 1990s, Victoria saw the number of local councils reduced from 210 to 78. South Australia, Tasmania and Queensland saw some reductions in
8769-415: The following: The Australian Capital Territory is not divided into local government areas, so it is regarded as a single "unincorporated" local government area during censusing . Unlike many other countries, Australia has only one level of local government immediately beneath state and territorial governments. Aside from very sparsely populated areas and a few other special cases, almost all of Australia
8880-592: 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
8991-496: The government (though they generally receive government funding). They do not have the power to change laws or policies, and their role is limited to advising government. They are effectively residents' associations . New South Wales has three unincorporated areas: In the Northern Territory , 1.47% of the total area and 3.0% of the population are in unincorporated areas. These include the Cox-Daly and Marrakai-Douglas Daly areas in
9102-572: 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
9213-436: 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
9324-441: 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
9435-608: The local legislation, as with Victoria 's alpine resorts ; or directly administered by state/territory governments, such as the entirety of the Australian Capital Territory . The administrative area covered by local government councils in Australia ranges from as small as 1.5 km (0.58 sq mi) for the Shire of Peppermint Grove in the Perth metropolitan region , to as big as 624,339 km (241,059 sq mi) for
9546-572: The mayor Lachlan Clyne was arrested by police for fraud and other things. However, all charges were thrown out of court in 2012. With the Police Ombudsman recommending that the police officer who led the failed investigation face internal disciplinary charges. Unley is one of three suburban Adelaide councils to be awarded a " Tree Cities of the World " designation from the Food and Agriculture Organization of
9657-540: The mayor is elected by the board of fellow councillors . The powers of mayors vary as well; for example, mayors in Queensland have broad executive functions, whereas mayors in New South Wales are essentially ceremonial figureheads who can only exercise power at the discretion of the council. Most of the capital city LGAs administer only the central business districts and nearby central suburbs . A notable exception
9768-413: 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
9879-618: The names of LGAs, and today the stylised titles of " town ", " borough ", " municipality ", " district ", " region ", "community government", " Aboriginal council/shire" and "island" are used in addition. The word "municipality" occurs in some states with differing meanings: in New South Wales it is typically used for older urban areas, and the word is used for some rural towns in South Australia . Larger towns and small metropolitan exurban centres in Queensland and Western Australia simply use
9990-649: The number of local governments while Western Australia and New South Wales rejected compulsory mergers. New South Wales eventually forced the merging of some councils. The main purpose of amalgamating councils was for greater efficiency and to improve operations, but forced amalgamation of councils is sometimes seen as a dilution of representative democracy . An increase in the range of services offered by councils, but only minor cost savings of less than 10% have been noted by academics as outcomes after mergers. The council mergers have resulted in widespread job losses and lingering resentment from some whose roles have experienced
10101-597: The part of local governments. There is no mention of local government in the Constitution of Australia , though it is mentioned several times in the Annotated Constitution of Australia. "Municipal institutions and local government" appears in Annotation 447, and "Power of the Parliament of a Colony" appears under "Residuary Legislative Powers" on pages 935 and 936. The first official local government in Australia
10212-812: The population, the population density and the proportion of the population that is classified as being urban for the council. The classification, at the two-digit level, is: All local governments are approximately equal in their theoretical powers, although LGAs that encompass large cities such as Brisbane and the Gold Coast command more resources due to their larger population base. Unlike local governments in many other countries, services such as police, fire protection and schools are provided by respective state or territory governments rather than by local councils. However, local governments still maintain some responsibility for fire service functions within Queensland and Western Australia. The councils' chief responsibility in
10323-414: The power to independently enact their own local subsidiary legislation , in contrast to the previous system of by-laws . Councils also have organised their own representative structures such as Local Government Associations and Regional Organisations of Councils . Doctrines of New Public Management have shaped state government legislation towards increased freedoms aiming to allow greater flexibility on
10434-526: The purpose of raising money to build roads in rural and outer-urban regions. Council representatives attended conventions before Federation , however local government was unquestionably regarded as outside the Constitutional realm. In the 1970s, the Whitlam government expanded the level of funding to local governments in Australia beyond grants for road construction. General purpose grants become available for
10545-424: The question: " What can Council do to help reduce community emissions ?" were: • Advocate for more renewable and affordable energy and vehicles • Support community solar or bulk purchase schemes • Provide additional waste management services • Provide green streets and public spaces • Provide safe and attractive walking and cycling routes • Advocate to State government for better public transport • Educate
10656-619: 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
10767-522: 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
10878-613: 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
10989-405: 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
11100-411: 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
11211-476: 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
11322-408: The same administrative functions and similar political structures, regardless of their naming, and retain a particular designation ("shire", "borough", "town", "city") for historical reasons only. They will typically have an elected council and usually a mayor or shire president responsible for chairing meetings of the council. In some councils, the mayor is a directly elected figure, but in most cases
11433-583: 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
11544-493: The state and Commonwealth governments. They are caricatured as being concerned only with the "three Rs": Rates, Roads and Rubbish. However, the roles of local government areas in Australia have recently expanded as higher levels of government have devolved activities to the third tier. Examples include the provision of community health services, regional airports and pollution control as well as community safety and accessible transport. The changes in services has been described as
11655-606: The term "town", while in Victoria they are designated as "rural city". Historically, the word "borough" was common for small towns and suburban centers in Victoria, but nowadays only the Borough of Queenscliffe remains as the one and only borough in the entire country. New South Wales and Queensland have also introduced a new term "region" for outback LGAs formed by the amalgamation of smaller shires and rural cities. In New South Wales, where
11766-745: The two-tier local government system in Canada or the United States , there is only one tier of local government in each Australian state/territory, with no distinction between counties and cities . The Australian local government is generally run by a council , and its territory of public administration is referred to generically by the Australian Bureau of Statistics as the local government area or LGA , each of which encompasses multiple suburbs or localities (roughly equivalent to neighborhoods) often of different postcodes ; however, stylised terms such as "city", " borough ", " region " and " shire " also have
11877-501: The varying designations, whilst the local governing legislature itself is generally known as a council . In general, an urban / suburban LGA is called a " city ", as in the City of Melbourne , City of Canada Bay and City of Bunbury ; while an exurban / rural LGA covering a larger agricultural / natural area is usually called a " shire ", as in Shire of Mornington Peninsula , Shire of Banana and Lachlan Shire . Sometimes designations other than "city" or "shire" are used in
11988-438: 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
12099-539: Was defeated. A 1988 referendum sought to explicitly insert mention of local government in the federal constitution but this was comprehensively defeated. A further referendum was proposed in 2013 , but was cancelled due to the change in the election date . Federal government interaction with local councils happens regularly through the provision of federal grants to help fund local government managed projects. Local government in Australia has very limited legislative powers and no judicial powers , and executive -wise
12210-524: 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
12321-600: Was the Perth Town Trust , established in 1838, only three years after British settlement. The Adelaide Corporation followed, created by the province of South Australia in October 1840. The City of Melbourne and the Sydney Corporation followed, both in 1842. All of these early forms failed; it was not until the 1860s and 1870s that the various colonies established widespread stable forms of local government, mainly for
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