120-604: The Western Big 6 Conference is a high school conference in western central Illinois . The conference participates in athletics and activities in the Illinois High School Association (IHSA). The conference comprises public high schools with large enrollments, as well a private school , in the Illinois Quad Cities , Galesburg, Illinois , and Quincy, Illinois . Sources:IHSA Conferences and IHSA Member Schools Directory The Western Big 6 Conference
240-611: A Jacksonville, Illinois businessman, who invited her to Illinois, where he had been working to build an asylum for the insane. With the lobbying expertise of Dix, plans for the Jacksonville State Hospital (now known as the Jacksonville Developmental Center ) were signed into law on March 1, 1847. During the American Civil War , Illinois ranked fourth in soldiers who served (more than 250,000) in
360-512: A cyclothem . Cyclothems are thought to have their origin in glacial cycles that produced fluctuations in sea level , which alternately exposed and then flooded large areas of continental shelf. The woody tissue of plants is composed mainly of cellulose, hemicellulose, and lignin. Modern peat is mostly lignin, with a content of cellulose and hemicellulose ranging from 5% to 40%. Various other organic compounds, such as waxes and nitrogen- and sulfur-containing compounds, are also present. Lignin has
480-591: A particle accelerator , which was the world's largest for over 40 years. With eleven plants currently operating, Illinois leads all states in the amount of electricity generated from nuclear power. In 1961, Illinois became the first state in the nation to adopt the recommendation of the American Law Institute and pass a comprehensive criminal code revision that repealed the law against sodomy . The code also abrogated common law crimes and established an age of consent of 18. The state's fourth constitution
600-578: A sanctuary state . In the 2018 election , Rauner was replaced by J. B. Pritzker , returning the state government to a Democratic trifecta . In January 2020 the state legalized marijuana . On March 9, 2020, Pritzker issued a disaster proclamation due to the COVID-19 pandemic . He ended the state of emergency in May 2023. During the early part of the Paleozoic Era , the area that would one day become Illinois
720-407: A succession crisis , Brigham Young led most Latter Day Saints out of Illinois in a mass exodus to present-day Utah ; after close to six years of rapid development, Nauvoo quickly declined afterward. After it was established in 1833, Chicago gained prominence as a Great Lakes port, and then as an Illinois and Michigan Canal port after 1848, and as a rail hub soon afterward. By 1857, Chicago
840-525: A 50-acre (20 ha) plaza larger than 35 football fields, and a woodhenge of sacred cedar, all in a planned design expressing the culture's cosmology. Monks Mound , the center of the site, is the largest Pre-Columbian structure north of the Valley of Mexico . It is 100 ft (30 m) high, 951 ft (290 m) long, 836 ft (255 m) wide, and covers 13.8 acres (5.6 ha). It contains about 814,000 cu yd (622,000 m ) of earth. It
960-585: A boom in 1937, and by 1939, Illinois ranked fourth in U.S. oil production. Illinois manufactured 6.1 percent of total United States military armaments produced during World War II , ranking seventh among the 48 states. Chicago became an ocean port with the opening of the Saint Lawrence Seaway in 1959. The seaway and the Illinois Waterway connected Chicago to both the Mississippi River and
1080-468: A chain of events culminating in Blagojevich's impeachment , trial, and subsequent criminal conviction and imprisonment, making Blagojevich the second consecutive Illinois governor to be convicted on federal corruption charges. Blagojevich's replacement Pat Quinn was defeated by Republican Bruce Rauner in the 2014 election . Disagreements between the governor and legislature over budgetary policy led to
1200-556: A climate that varies widely throughout the year. Because of its nearly 400-mile distance between its northernmost and southernmost extremes, as well as its mid-continental situation, most of Illinois has a humid continental climate ( Köppen climate classification Dfa ), with hot, humid summers and cold winters. The southern part of the state, from about Carbondale southward, has a humid subtropical climate (Koppen Cfa ), with more moderate winters. Average yearly precipitation for Illinois varies from just over 48 in (1,219 mm) at
1320-780: A fort at the site of present-day Peoria , and in 1682, a fort atop Starved Rock in today's Starved Rock State Park. French Empire Canadiens came south to settle particularly along the Mississippi River, and Illinois was part of first New France , and then of La Louisiane until 1763, when it passed to the British with their defeat of France in the Seven Years' War . The small French settlements continued, although many French migrated west to Ste. Genevieve and St. Louis, Missouri , to evade British rule. A few British soldiers were posted in Illinois, but few British or American settlers moved there, as
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#17330847041551440-670: A law to prohibit all African Americans, including freedmen , from settling in the state. The winter of 1830–1831 is called the "Winter of the Deep Snow"; a sudden, deep snowfall blanketed the state, making travel impossible for the rest of the winter, and many travelers perished. Several severe winters followed, including the "Winter of the Sudden Freeze". On December 20, 1836, a fast-moving cold front passed through, freezing puddles in minutes and killing many travelers who could not reach shelter. The adverse weather resulted in crop failures in
1560-705: A north–south line at 87° 31′ 30″ west longitude in Lake Michigan at the north, to the Wabash River in the south above Post Vincennes . The Wabash River continues as the eastern/southeastern border with Indiana until the Wabash enters the Ohio River . This marks the beginning of Illinois's southern border with Kentucky , which runs along the northern shoreline of the Ohio River. Most of the western border with Missouri and Iowa
1680-417: A process called carbonization . Carbonization proceeds primarily by dehydration , decarboxylation , and demethanation. Dehydration removes water molecules from the maturing coal via reactions such as Decarboxylation removes carbon dioxide from the maturing coal: while demethanation proceeds by reaction such as In these formulas, R represents the remainder of a cellulose or lignin molecule to which
1800-575: A state in 1818, the Ordinance no longer applied, and about 900 slaves were held in the state. As the southern part of the state, later known as "Egypt" or "Little Egypt", was largely settled by migrants from the South, the section was hostile to free blacks. Edward Coles , the second Governor of Illinois who was born in Virginia, participated in a campaign to block extending existing slavery in Illinois after winning
1920-684: A string of high-profile exonerations, Ryan commuted all death sentences in the state. The 2002 election brought Democrat Rod Blagojevich to the governor's mansion. It also brought future president Barack Obama into a committee leadership position in the Illinois Senate, where he drafted the Health Care Justice Act , a forerunner of the Affordable Care Act . Obama's election to the presidency in Blagojevich's second term set off
2040-527: A switch in fuels happened in London in the late sixteenth and early seventeenth centuries. Historian Ruth Goodman has traced the socioeconomic effects of that switch and its later spread throughout Britain and suggested that its importance in shaping the industrial adoption of coal has been previously underappreciated. The development of the Industrial Revolution led to the large-scale use of coal, as
2160-549: A tenth. Indonesia and Australia export the most, followed by Russia . The word originally took the form col in Old English , from reconstructed Proto-Germanic * kula ( n ), from Proto-Indo-European root * g ( e ) u-lo- "live coal". Germanic cognates include the Old Frisian kole , Middle Dutch cole , Dutch kool , Old High German chol , German Kohle and Old Norse kol . Irish gual
2280-638: A weather station not subjected to the same quality control as official records. Illinois averages approximately 51 days of thunderstorm activity a year, which ranks somewhat above average in the number of thunderstorm days for the United States. Illinois is vulnerable to tornadoes, with an average of 35 occurring annually, which puts much of the state at around five tornadoes per 10,000 sq mi (30,000 km ) annually. While tornadoes are no more powerful in Illinois than other states, some of Tornado Alley 's deadliest tornadoes on record have occurred in
2400-403: A weight basis. This composition reflects partly the composition of the precursor plants. The second main fraction of coal is ash, an undesirable, noncombustable mixture of inorganic minerals. The composition of ash is often discussed in terms of oxides obtained after combustion in air: Of particular interest is the sulfur content of coal, which can vary from less than 1% to as much as 4%. Most of
2520-406: A weight composition of about 54% carbon, 6% hydrogen, and 30% oxygen, while cellulose has a weight composition of about 44% carbon, 6% hydrogen, and 49% oxygen. Bituminous coal has a composition of about 84.4% carbon, 5.4% hydrogen, 6.7% oxygen, 1.7% nitrogen, and 1.8% sulfur, on a weight basis. The low oxygen content of coal shows that coalification removed most of the oxygen and much of the hydrogen
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#17330847041552640-530: A wide variety of ethnic groups. The city of Rockford , Illinois's third-largest city and center of the state's fourth largest metropolitan area, sits along Interstates 39 and 90 some 75 mi (121 km) northwest of Chicago. The Quad Cities region, located along the Mississippi River in northern Illinois, had a population of 381,342 in 2011. The midsection of Illinois is the second major division, called Central Illinois . Historically prairie , it
2760-561: Is ireniwaki . The name Illiniwek has also been said to mean 'tribe of superior men', which is a false etymology . The name Illinois derives from the Miami-Illinois verb irenwe·wa 'he speaks the regular way'. This was taken into the Ojibwe language , perhaps in the Ottawa dialect , and modified into ilinwe· (pluralized as ilinwe·k ). The French borrowed these forms, spelling
2880-523: Is Springfield in the center of the state, and the state's largest city is Chicago in the northeast. Present-day Illinois was inhabited by Indigenous cultures for thousands of years. The French were the first Europeans to arrive, settling near the Mississippi and Illinois River in the 17th century Illinois Country , as part of their sprawling colony of New France . A century later, the revolutionary Illinois campaign prefigured American involvement in
3000-625: Is also a cognate via the Indo-European root. The conversion of dead vegetation into coal is called coalification . At various times in the geologic past, the Earth had dense forests in low-lying areas. In these wetlands, the process of coalification began when dead plant matter was protected from oxidation , usually by mud or acidic water, and was converted into peat . The resulting peat bogs , which trapped immense amounts of carbon, were eventually deeply buried by sediments. Then, over millions of years,
3120-429: Is burned in a turbine). Hot exhaust gases from the turbine are used to raise steam in a heat recovery steam generator which powers a supplemental steam turbine . The overall plant efficiency when used to provide combined heat and power can reach as much as 94%. IGCC power plants emit less local pollution than conventional pulverized coal-fueled plants. Other ways to use coal are as coal-water slurry fuel (CWS), which
3240-482: Is defined as 10 miles north of the southernmost extremity of Lake Michigan. However, the Illinois delegate, Nathaniel Pope , wanted more, and lobbied to have the boundary moved further north. The final bill passed by Congress included an amendment to shift the border to 42° 30' north, which is approximately 51 mi (82 km) north of the Indiana northern border. This shift added 8,500 sq mi (22,000 km ) to
3360-594: Is entirely vertical; however, metamorphism may cause lateral changes of rank, irrespective of depth. For example, some of the coal seams of the Madrid, New Mexico coal field were partially converted to anthracite by contact metamorphism from an igneous sill while the remainder of the seams remained as bituminous coal. The earliest recognized use is from the Shenyang area of China where by 4000 BC Neolithic inhabitants had begun carving ornaments from black lignite. Coal from
3480-455: Is made when metallurgical coal (also known as coking coal ) is baked in an oven without oxygen at temperatures as high as 1,000 °C, driving off the volatile constituents and fusing together the fixed carbon and residual ash. Metallurgical coke is used as a fuel and as a reducing agent in smelting iron ore in a blast furnace . The carbon monoxide produced by its combustion reduces hematite (an iron oxide ) to iron. Pig iron , which
3600-409: Is more abundant, and anthracite. The % carbon in coal follows the order anthracite > bituminous > lignite > brown coal. The fuel value of coal varies in the same order. Some anthracite deposits contain pure carbon in the form of graphite . For bituminous coal, the elemental composition on a dry, ash-free basis of 84.4% carbon, 5.4% hydrogen, 6.7% oxygen, 1.7% nitrogen, and 1.8% sulfur, on
3720-432: Is mostly carbon with variable amounts of other elements , chiefly hydrogen , sulfur , oxygen , and nitrogen . Coal is a type of fossil fuel , formed when dead plant matter decays into peat which is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands called coal forests that covered much of the Earth's tropical land areas during
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3840-689: Is now mainly agricultural and known as the Heart of Illinois. It is characterized by small towns and medium–small cities. The western section (west of the Illinois River) was originally part of the Military Tract of 1812 and forms the conspicuous western bulge of the state. Agriculture, particularly corn and soybeans , as well as educational institutions and manufacturing centers, figure prominently in Central Illinois. Cities include Peoria ; Springfield ,
3960-557: Is separated from the rest of the state by the Mississippi River. This region has a somewhat warmer winter climate, different variety of crops (including some cotton farming in the past), more rugged topography (due to the area remaining unglaciated during the Illinoian Stage , unlike most of the rest of the state), as well as small-scale oil deposits and coal mining. The Illinois suburbs of St. Louis , such as East St. Louis , are located in this region, and collectively, they are known as
4080-418: Is the Mississippi River ; Kaskaskia is an exclave of Illinois, lying west of the Mississippi and reachable only from Missouri. The state's northern border with Wisconsin is fixed at 42° 30′ north latitude. The northeastern border of Illinois lies in Lake Michigan , within which Illinois shares a water boundary with the state of Michigan , as well as Wisconsin and Indiana. Though Illinois lies entirely in
4200-452: Is used as fuel. 27.6% of world energy was supplied by coal in 2017 and Asia used almost three-quarters of it. Other large-scale applications also exist. The energy density of coal is roughly 24 megajoules per kilogram (approximately 6.7 kilowatt-hours per kg). For a coal power plant with a 40% efficiency, it takes an estimated 325 kg (717 lb) of coal to power a 100 W lightbulb for one year. In 2022, 68% of global coal use
4320-520: The /we/ ending as -ois , a transliteration of that sound in the French of that time. The current spelling form, Illinois , began to appear in the early 1670s, when French colonists had settled in the western area. The Illinois's name for themselves, as attested in all three of the French missionary-period dictionaries of Illinois, was Inoka , of unknown meaning and unrelated to the other terms. American Indians of successive cultures lived along
4440-424: The 1822 Illinois gubernatorial election . In 1824, state residents voted against making slavery legal by a vote of 6640 against to 4972 for. Still, most residents opposed allowing free blacks as permanent residents. Some settlers brought in slaves seasonally or as house servants. The Illinois Constitution of 1848 was written with a provision for exclusionary laws to be passed. In 1853, John A. Logan helped pass
4560-589: The Atlantic Ocean . In 1960, Ray Kroc opened the first McDonald's franchise in Des Plaines , which was demolished in 1984. In 1985 a replica was built on the same site to recreate how the original one looked. Though this replica was demolished in 2017, due to repeated flooding of the building. Illinois had a prominent role in the emergence of the nuclear age . In 1942, as part of the Manhattan Project ,
4680-691: The Bronze Age (3000–2000 BC), where it formed part of funeral pyres . In Roman Britain , with the exception of two modern fields, "the Romans were exploiting coals in all the major coalfields in England and Wales by the end of the second century AD". Evidence of trade in coal, dated to about AD 200, has been found at the Roman settlement at Heronbridge , near Chester ; and in the Fenlands of East Anglia , where coal from
4800-773: The Eocene Epoch . During the Pleistocene Epoch , vast ice sheets covered much of Illinois, with only the Driftless Area remaining exposed. These glaciers carved the basin of Lake Michigan and left behind traces of ancient glacial lakes and moraines . Illinois is located in the Midwest region of the United States and is one of the eight states in the Great Lakes region of North America (which also includes Ontario , Canada). Illinois's eastern border with Indiana consists of
4920-512: The Fushun mine in northeastern China was used to smelt copper as early as 1000 BC. Marco Polo , the Italian who traveled to China in the 13th century, described coal as "black stones ... which burn like logs", and said coal was so plentiful, people could take three hot baths a week. In Europe, the earliest reference to the use of coal as fuel is from the geological treatise On Stones (Lap. 16) by
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5040-531: The Illinois Native Americans , a name that was spelled in many different ways in the early records. American scholars previously thought the name Illinois meant 'man' or 'men' in the Miami-Illinois language , with the original iliniwek transformed via French into Illinois. This etymology is not supported by the Illinois language, as the word for "man" is ireniwa , and plural of "man"
5160-480: The Illinois Budget Impasse , a 793-day period stretching from 2015 to 2018 in which the state had no budget and struggled to pay its bills. On August 28, 2017, Rauner signed a bill into law that prohibited state and local police from arresting anyone solely due to their immigration status or due to federal detainers. Some fellow Republicans criticized Rauner for his action, claiming the bill made Illinois
5280-661: The Interior Plains , it does have some minor variation in its elevation. In extreme northwestern Illinois, the Driftless Area , a region of unglaciated and therefore higher and more rugged topography, occupies a small part of the state. Southern Illinois includes the hilly areas around the Shawnee National Forest . Charles Mound , located in the Driftless region, has the state's highest natural elevation above sea level at 1,235 ft (376 m). Other highlands include
5400-648: The Latter Day Saints had founded a utopian city called Nauvoo , formerly called Commerce. Located in Hancock County along the Mississippi River , Nauvoo flourished and, by 1844, briefly surpassed Chicago for the position of the state's largest city. But in that same year, the Latter Day Saint movement founder, Joseph Smith , was killed in the Carthage Jail , about 30 miles away from Nauvoo. Following
5520-678: The Metro-East . The other somewhat significant concentration of population in Southern Illinois is the Carbondale-Marion-Herrin, Illinois Combined Statistical Area centered on Carbondale and Marion , a two-county area that is home to 123,272 residents. A portion of southeastern Illinois is part of the extended Evansville, Indiana , Metro Area, locally referred to as the Tri-State with Indiana and Kentucky. Seven Illinois counties are in
5640-590: The Midlands was transported via the Car Dyke for use in drying grain. Coal cinders have been found in the hearths of villas and Roman forts , particularly in Northumberland , dated to around AD 400. In the west of England, contemporary writers described the wonder of a permanent brazier of coal on the altar of Minerva at Aquae Sulis (modern day Bath ), although in fact easily accessible surface coal from what became
5760-531: The Midwest region . Chicago, the third-most populous city in the United States , is the center of the Chicago metropolitan area or Chicagoland, as this area is nicknamed. Although the Chicago metropolitan area comprises only 9% of the land area of the state, it contains 65% of the state's residents, with 21.4% of Illinois' population living in the city of Chicago itself as of 2020. The losses of population anticipated from
5880-625: The Shawnee Hills in the south, and there is varying topography along its rivers; the Illinois River bisects the state northeast to southwest. The floodplain on the Mississippi River from Alton to the Kaskaskia River is known as the American Bottom . Illinois has three major geographical divisions. Northern Illinois is dominated by Chicago metropolitan area , or Chicagoland, which is
6000-702: The Somerset coalfield was in common use in quite lowly dwellings locally. Evidence of coal's use for iron -working in the city during the Roman period has been found. In Eschweiler , Rhineland , deposits of bituminous coal were used by the Romans for the smelting of iron ore . No evidence exists of coal being of great importance in Britain before about AD 1000, the High Middle Ages . Coal came to be referred to as "seacoal" in
6120-470: The Union Army , a figure surpassed by only New York, Pennsylvania , and Ohio . Beginning with President Abraham Lincoln 's first call for troops and continuing throughout the war, Illinois mustered 150 infantry regiments, which were numbered from the 7th to the 156th regiments. Seventeen cavalry regiments were also gathered, as well as two light artillery regiments. The town of Cairo , at the southern tip of
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#17330847041556240-472: The United States . It borders the state of Wisconsin to its north, Iowa to its northwest, Missouri to its southwest, Kentucky to its south, Indiana to its east, and has a water border with Michigan to the northeast in Lake Michigan . Of the fifty U.S. states, Illinois has the fifth-largest gross domestic product (GDP) , the sixth-largest population , and the 25th-most land area . Its capital city
6360-475: The University of Chicago conducted the first sustained nuclear chain reaction . In 1957, Argonne National Laboratory , near Chicago , activated the first experimental nuclear power generating system in the United States. By 1960, the first privately financed nuclear plant in the United States, Dresden 1 , was dedicated near Morris . In 1967, Fermilab , a national nuclear research facility near Batavia , opened
6480-491: The coal gap in the Permian–Triassic extinction event , where coal is rare. Favorable geography alone does not explain the extensive Carboniferous coal beds. Other factors contributing to rapid coal deposition were high oxygen levels, above 30%, that promoted intense wildfires and formation of charcoal that was all but indigestible by decomposing organisms; high carbon dioxide levels that promoted plant growth; and
6600-444: The steam engine took over from the water wheel . In 1700, five-sixths of the world's coal was mined in Britain. Britain would have run out of suitable sites for watermills by the 1830s if coal had not been available as a source of energy. In 1947 there were some 750,000 miners in Britain, but the last deep coal mine in the UK closed in 2015. A grade between bituminous coal and anthracite
6720-407: The 13th century; the wharf where the material arrived in London was known as Seacoal Lane, so identified in a charter of King Henry III granted in 1253. Initially, the name was given because much coal was found on the shore, having fallen from the exposed coal seams on cliffs above or washed out of underwater coal outcrops, but by the time of Henry VIII , it was understood to derive from the way it
6840-431: The 2020 census results do not arise from the Chicago metro area; rather the declines are from the Downstate counties. As of the 2020 census, the state's geographic mean center of population is located at 41° 18′ 43″N 88° 22 23″W in Grundy County , about six miles northwest of Coal City . Coal Coal is a combustible black or brownish-black sedimentary rock , formed as rock strata called coal seams . Coal
6960-455: The Carboniferous, and suggested that climatic and tectonic factors were a more plausible explanation, reconstruction of ancestral enzymes by phylogenetic analysis corroborated a hypothesis that lignin degrading enzymes appeared in fungi approximately 200 MYa. One likely tectonic factor was the Central Pangean Mountains , an enormous range running along the equator that reached its greatest elevation near this time. Climate modeling suggests that
7080-519: The Central Pangean Mountains contributed to the deposition of vast quantities of coal in the late Carboniferous. The mountains created an area of year-round heavy precipitation, with no dry season typical of a monsoon climate. This is necessary for the preservation of peat in coal swamps. Coal is known from Precambrian strata, which predate land plants. This coal is presumed to have originated from residues of algae. Sometimes coal seams (also known as coal beds) are interbedded with other sediments in
7200-484: The Crown made it part of the territory reserved for Indians west of the Appalachians, and then part of the British Province of Quebec . In 1778, George Rogers Clark claimed Illinois County for Virginia . In a compromise, Virginia (and other states that made various claims) ceded the area to the new United States in the 1780s and it became part of the Northwest Territory , administered by the federal government and later organized as states. The Illinois-Wabash Company
7320-488: The Fox ( Meskwaki ), Iowa , Kickapoo , Mascouten , Piankeshaw , Shawnee , Wea , and Winnebago ( Ho-Chunk ) came into the area from the east and north around the Great Lakes. French explorers Jacques Marquette and Louis Jolliet explored the Illinois River in 1673. Marquette soon after founded a mission at the Grand Village of the Illinois in Illinois Country . In 1680, French explorers under René-Robert Cavelier, Sieur de La Salle and Henri de Tonti constructed
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#17330847041557440-413: The Greek scientist Theophrastus (c. 371–287 BC): Among the materials that are dug because they are useful, those known as anthrakes [coals] are made of earth, and, once set on fire, they burn like charcoal [anthrakes]. They are found in Liguria ... and in Elis as one approaches Olympia by the mountain road; and they are used by those who work in metals. Outcrop coal was used in Britain during
7560-404: The advent of the Western Big 6 Conference, the schools of the present day conference are known to have participated in several other conferences: The present-day Western Big 6 Conference has won 38 state championships in IHSA-sponsored athletics and activities: Illinois Illinois ( / ˌ ɪ l ɪ ˈ n ɔɪ / IL -in- OY ) is a state in the Midwestern region of
7680-491: The area. In addition to these three, largely latitudinally defined divisions, all of the region outside the Chicago metropolitan area is often called " downstate " Illinois. This term is flexible, but is generally meant to mean everything outside the influence of the Chicago area. Thus, some cities in Northern Illinois, such as DeKalb , which is west of Chicago, and Rockford —which is actually north of Chicago—are sometimes incorrectly considered to be 'downstate'. Illinois has
7800-474: The central Illinois River valley, one third of all adults died as a result of violent injuries." The next major power in the region was the Illinois Confederation or Illini, a political alliance. Around the time of European contact in 1673, the Illinois confederation had an estimated population of over 10,000 people. As the Illini declined during the Beaver Wars era, members of the Algonquian -speaking Potawatomi , Miami , Sauk , and other tribes including
7920-444: The central and southern areas attracted immigrants from Eastern and Southern Europe . Illinois became one of America's most industrialized states and remains a major manufacturing center. The Great Migration from the South established a large Black community, particularly in Chicago , which became a leading cultural, economic, and population center; its metropolitan area , informally referred to as Chicagoland , holds about 65% of
8040-409: The city of Chicago and its suburbs, and the adjoining exurban area into which the metropolis is expanding. As defined by the federal government, the Chicago metro area includes several counties in Illinois, Indiana , and Wisconsin , and has a population of over 9.8 million. Chicago itself is a cosmopolitan city, densely populated, industrialized, the transportation hub of the nation, and settled by
8160-446: The development of the American labor movement . From Sunday, October 8, 1871, until Tuesday, October 10, 1871, the Great Chicago Fire burned in downtown Chicago, destroying four sq mi (10 km ). At the turn of the 20th century, Illinois had a population of nearly 5 million. Many people from other parts of the country were attracted to the state by employment caused by the expanding industrial base. Whites were 98% of
8280-548: The end of Indian resistance to white settlement in the Chicago region. The Indians had been forced to leave their homes and move to Iowa in 1831; when they attempted to return, they were attacked and eventually defeated by U.S. militia . The survivors were forced back to Iowa. By 1832, when the last Indian lands in Illinois were ceded to the United States, the indigenous population of the state had been reduced by infectious diseases, warfare, and forced westward removal to only one village with fewer than 300 inhabitants. By 1839,
8400-571: The environment , causing premature death and illness, and it is the largest anthropogenic source of carbon dioxide contributing to climate change . Fourteen billion tonnes of carbon dioxide were emitted by burning coal in 2020, which is 40% of total fossil fuel emissions and over 25% of total global greenhouse gas emissions . As part of worldwide energy transition , many countries have reduced or eliminated their use of coal power . The United Nations Secretary General asked governments to stop building new coal plants by 2020. Global coal use
8520-430: The evolution of the first trees . But bacteria and fungi did not immediately evolve the ability to decompose lignin, so the wood did not fully decay but became buried under sediment, eventually turning into coal. About 300 million years ago, mushrooms and other fungi developed this ability, ending the main coal-formation period of earth's history. Although some authors pointed at some evidence of lignin degradation during
8640-512: The factors involved in coalification, temperature is much more important than either pressure or time of burial. Subbituminous coal can form at temperatures as low as 35 to 80 °C (95 to 176 °F) while anthracite requires a temperature of at least 180 to 245 °C (356 to 473 °F). Although coal is known from most geologic periods , 90% of all coal beds were deposited in the Carboniferous and Permian periods. Paradoxically, this
8760-498: The form of iron pyrite (FeS 2 ). Being a dense mineral, it can be removed from coal by mechanical means, e.g. by froth flotation . Some sulfate occurs in coal, especially weathered samples. It is not volatilized and can be removed by washing. Minor components include: As minerals, Hg, As, and Se are not problematic to the environment, especially since they are only trace components. They become however mobile (volatile or water-soluble) when these minerals are combusted. Most coal
8880-475: The heat and pressure of deep burial caused the loss of water, methane and carbon dioxide and increased the proportion of carbon. The grade of coal produced depended on the maximum pressure and temperature reached, with lignite (also called "brown coal") produced under relatively mild conditions, and sub-bituminous coal , bituminous coal , or anthracite coal (also called "hard coal" or "black coal") produced in turn with increasing temperature and pressure. Of
9000-431: The increasing tendency of the anthracite to break with a conchoidal fracture , similar to the way thick glass breaks. As geological processes apply pressure to dead biotic material over time, under suitable conditions, its metamorphic grade or rank increases successively into: There are several international standards for coal. The classification of coal is generally based on the content of volatiles . However
9120-518: The late Carboniferous ( Pennsylvanian ) and Permian times. Coal is used primarily as a fuel. While coal has been known and used for thousands of years, its usage was limited until the Industrial Revolution . With the invention of the steam engine , coal consumption increased. In 2020, coal supplied about a quarter of the world's primary energy and over a third of its electricity . Some iron and steel -making and other industrial processes burn coal. The extraction and burning of coal damages
9240-453: The morphology and some properties of the original plant. In many coals, individual macerals can be identified visually. Some macerals include: In coalification huminite is replaced by vitreous (shiny) vitrinite . Maturation of bituminous coal is characterized by bitumenization , in which part of the coal is converted to bitumen , a hydrocarbon-rich gel. Maturation to anthracite is characterized by debitumenization (from demethanation) and
9360-405: The most important distinction is between thermal coal (also known as steam coal), which is burnt to generate electricity via steam; and metallurgical coal (also known as coking coal), which is burnt at high temperature to make steel . Hilt's law is a geological observation that (within a small area) the deeper the coal is found, the higher its rank (or grade). It applies if the thermal gradient
9480-515: The nation's railroad hub since the 1860s, and its O'Hare International Airport has been among the world's busiest airports for decades. Illinois has long been considered a microcosm of the United States and a bellwether in American culture, exemplified by the phrase Will it play in Peoria? . "Illinois" is the modern spelling for the early French Catholic missionaries and explorers' name for
9600-407: The nature of Carboniferous forests, which included lycophyte trees whose determinate growth meant that carbon was not tied up in heartwood of living trees for long periods. One theory suggested that about 360 million years ago, some plants evolved the ability to produce lignin , a complex polymer that made their cellulose stems much harder and more woody. The ability to produce lignin led to
9720-499: The north and center, and natural resources such as coal, timber, and petroleum in the south. Owing to its central location and favorable geography, the state is a major transportation hub : the Port of Chicago has access to the Atlantic Ocean through the Great Lakes and Saint Lawrence Seaway and to the Gulf of Mexico from the Mississippi River via the Illinois Waterway . Chicago has been
9840-611: The northern part of the state. The southern part of the state shipped food north, and this may have contributed to its name, " Little Egypt ", after the Biblical story of Joseph in Egypt supplying grain to his brothers. In 1832, the Black Hawk War was fought in Illinois and present-day Wisconsin between the United States and the Sauk , Fox (Meskwaki) , and Kickapoo Indian tribes. It represents
9960-455: The number of double bonds between carbon). As carbonization proceeds, aliphatic compounds convert to aromatic compounds . Similarly, aromatic rings fuse into polyaromatic compounds (linked rings of carbon atoms). The structure increasingly resembles graphene , the structural element of graphite. Chemical changes are accompanied by physical changes, such as decrease in average pore size. The macerals are coalified plant parts that retain
10080-399: The population of Illinois was 12,812,508 in the 2020 United States census , moving from the fifth-largest state to the sixth-largest state (losing out to Pennsylvania). Illinois' population slightly declined in 2020 from the 2010 United States census by just over 18,000 residents and the overall population was quite higher than recent census estimates. Illinois is the most populous state in
10200-456: The pre-combustion treatment, turbine technology (e.g. supercritical steam generator ) and the age of the plant. A few integrated gasification combined cycle (IGCC) power plants have been built, which burn coal more efficiently. Instead of pulverizing the coal and burning it directly as fuel in the steam-generating boiler, the coal is gasified to create syngas , which is burned in a gas turbine to produce electricity (just like natural gas
10320-427: The reacting groups are attached. Dehydration and decarboxylation take place early in coalification, while demethanation begins only after the coal has already reached bituminous rank. The effect of decarboxylation is to reduce the percentage of oxygen, while demethanation reduces the percentage of hydrogen. Dehydration does both, and (together with demethanation) reduces the saturation of the carbon backbone (increasing
10440-578: The region. Following U.S. independence in 1783 , which made the Mississippi River the national boundary, American settlers began arriving from Kentucky via the Ohio River. Illinois was soon part of the United States' oldest territory, the Northwest Territory , and in 1818 it achieved statehood . The Erie Canal brought increased commercial activity in the Great Lakes, and the invention of the self-scouring steel plow by Illinoisan John Deere turned
10560-586: The second-most populous urban area in Illinois with over 700,000 residents. Other major urban areas include the Peoria metropolitan area , Rockford metropolitan area , Champaign–Urbana metropolitan area (home to the University of Illinois ), Springfield metropolitan area , the Illinois portion of the Quad Cities area, and the Bloomington–Normal metropolitan area . The United States Census Bureau found that
10680-423: The southern tip of Lake Michigan. Such a boundary would have left Illinois with no shoreline on Lake Michigan at all. However, as Indiana had successfully been granted a 10 mi (16 km) northern extension of its boundary to provide it with a usable lakefront, the original bill for Illinois statehood, submitted to Congress on January 23, 1818, stipulated a northern border at the same latitude as Indiana's, which
10800-402: The southern tip to around 35 in (889 mm) in the northern portion of the state. Normal annual snowfall exceeds 38 in (965 mm) in the Chicago area, while the southern portion of the state normally receives less than 14 in (356 mm). The all-time high temperature was 117 °F (47 °C), recorded on July 14, 1954, at East St. Louis , and the all-time low temperature
10920-579: The state at the confluence of the Mississippi and Ohio Rivers, served as a strategically important supply base and training center for the Union army. For several months, both General Grant and Admiral Foote had headquarters in Cairo. During the Civil War, and more so afterwards, Chicago's population skyrocketed, which increased its prominence. The Pullman Strike and Haymarket Riot , in particular, greatly influenced
11040-407: The state capital; Quincy ; Decatur ; Bloomington-Normal ; and Champaign - Urbana . The third division is Southern Illinois , comprising the area south of U.S. Route 50 , including Little Egypt , near the juncture of the Mississippi River and Ohio River . Southern Illinois is the site of the ancient city of Cahokia , as well as the site of the first state capital at Kaskaskia , which today
11160-578: The state's 12.8 million residents. Two World Heritage Sites are in Illinois, the ancient Cahokia Mounds , and part of the Wright architecture site. Major centers of learning include the University of Chicago , University of Illinois , and Northwestern University . A wide variety of protected areas seek to conserve Illinois' natural and cultural resources. Three U.S. presidents have been elected while residents of Illinois: Abraham Lincoln , Ulysses S. Grant , and Barack Obama ; additionally, Ronald Reagan
11280-568: The state's population. Bolstered by continued immigration from southern and eastern Europe , and by the African-American Great Migration from the South, Illinois grew and emerged as one of the most important states in the union. By the end of the century, the population had reached 12.4 million. The Century of Progress World's fair was held at Chicago in 1933. Oil strikes in Marion County and Crawford County led to
11400-475: The state's rich prairie into some of the world's most productive and valuable farmland, attracting immigrant farmers from Germany and Sweden . In the mid-19th century, the Illinois and Michigan Canal and a sprawling railroad network facilitated trade, commerce, and settlement, making the state a transportation hub for the nation. By 1900, the growth of industrial jobs in the northern cities and coal mining in
11520-475: The state, including the lead mining region near Galena . More importantly, it added nearly 50 miles of Lake Michigan shoreline and the Chicago River. Pope and others envisioned a canal that would connect the Chicago and Illinois rivers and thus connect the Great Lakes to the Mississippi. In 1818, Illinois became the 21st U.S. state. The capital remained at Kaskaskia, headquartered in a small building rented by
11640-422: The state. In 1819, Vandalia became the capital, and over the next 18 years, three separate buildings were built to serve successively as the capitol building. In 1837, the state legislators representing Sangamon County , under the leadership of state representative Abraham Lincoln , succeeded in having the capital moved to Springfield , where a fifth capitol building was constructed. A sixth capitol building
11760-448: The state. The Tri-State Tornado of 1925 killed 695 people in three states; 613 of the victims died in Illinois. Chicago is the largest city in the state and the third-most populous city in the United States, with a population of 2,746,388 in 2020. Furthermore, over 7 million residents of the Chicago metropolitan area reside in Illinois. The U.S. Census Bureau currently lists seven other cities with populations of over 100,000 within
11880-473: The state. This includes the Chicago satellite towns of Aurora , Joliet , Naperville , and Elgin , as well as the cities of Rockford , the most populous city in the state outside of the Chicago area; Springfield , the state's capital; and Peoria . The most populated city in the state south of Springfield is Belleville , with 42,000 residents. It is located in the Metro East region of Greater St. Louis ,
12000-399: The sulfur and most of the nitrogen is incorporated into the organic fraction in the form of organosulfur compounds and organonitrogen compounds . This sulfur and nitrogen are strongly bound within the hydrocarbon matrix. These elements are released as SO 2 and NO x upon combustion. They cannot be removed, economically at least, otherwise. Some coals contain inorganic sulfur, mainly in
12120-493: The waterways of the Illinois area for thousands of years before the arrival of Europeans. The Koster Site has been excavated and demonstrates 7,000 years of continuous habitation. Cahokia , the largest regional chiefdom and Urban Center of the Pre-Columbian Mississippian culture , was located near present-day Collinsville, Illinois . They built an urban complex of more than 100 platform and burial mounds ,
12240-415: The world's coal-generated electricity. Efforts around the world to reduce the use of coal have led some regions to switch to natural gas and renewable energy . In 2018 coal-fired power station capacity factor averaged 51%, that is they operated for about half their available operating hours. Coke is a solid carbonaceous residue that is used in manufacturing steel and other iron-containing products. Coke
12360-574: Was 8.3 billion tonnes in 2022, and is set to remain at record levels in 2023. To meet the Paris Agreement target of keeping global warming below 2 °C (3.6 °F) coal use needs to halve from 2020 to 2030, and "phasing down" coal was agreed upon in the Glasgow Climate Pact . The largest consumer and importer of coal in 2020 was China , which accounts for almost half the world's annual coal production, followed by India with about
12480-455: Was Illinois's largest city. With the tremendous growth of mines and factories in the state in the 19th century, Illinois was the ground for the formation of labor unions in the United States . In 1847, after lobbying by Dorothea L. Dix , Illinois became one of the first states to establish a system of state-supported treatment of mental illness and disabilities, replacing local almshouses . Dix came into this effort after having met J. O. King,
12600-569: Was adopted in 1970, replacing the 1870 document. The first Farm Aid concert was held in Champaign to benefit American farmers, in 1985. The worst upper Mississippi River flood of the century, the Great Flood of 1993 , inundated many towns and thousands of acres of farmland. Illinois entered the 21st century under Republican Governor George Ryan . Near the end of his term in January 2003, following
12720-518: Was an early claimant to much of Illinois. The Illinois Territory was created on February 3, 1809, with its capital at Kaskaskia , an early French settlement. During the discussions leading up to Illinois's admission to the Union , the proposed northern boundary of the state was moved twice. The original provisions of the Northwest Ordinance had specified a boundary that would have been tangent to
12840-574: Was based on the trading of this commodity. Coal continues to arrive on beaches around the world from both natural erosion of exposed coal seams and windswept spills from cargo ships. Many homes in such areas gather this coal as a significant, and sometimes primary, source of home heating fuel. Coal consists mainly of a black mixture of diverse organic compounds and polymers. Of course, several kinds of coals exist, with variable dark colors and variable compositions. Young coals (brown coal, lignite) are not black. The two main black coals are bituminous, which
12960-625: Was born and raised in the state. Illinois honors Lincoln with its official state slogan Land of Lincoln . The state is the site of the Abraham Lincoln Presidential Library and Museum in Springfield and the future home of the Barack Obama Presidential Center in Chicago. Illinois has a highly diverse economy , with the global city of Chicago in the northeast, major industrial and agricultural hubs in
13080-504: Was carried to London by sea. In 1257–1259, coal from Newcastle upon Tyne was shipped to London for the smiths and lime -burners building Westminster Abbey . Seacoal Lane and Newcastle Lane, where coal was unloaded at wharves along the River Fleet , still exist. These easily accessible sources had largely become exhausted (or could not meet the growing demand) by the 13th century, when underground extraction by shaft mining or adits
13200-602: Was developed in the Soviet Union , or in an MHD topping cycle . However these are not widely used due to lack of profit. In 2017 38% of the world's electricity came from coal, the same percentage as 30 years previously. In 2018 global installed capacity was 2 TW (of which 1TW is in China) which was 30% of total electricity generation capacity. The most dependent major country is South Africa, with over 80% of its electricity generated by coal; but China alone generates more than half of
13320-408: Was developed. The alternative name was "pitcoal", because it came from mines. Cooking and home heating with coal (in addition to firewood or instead of it) has been done in various times and places throughout human history, especially in times and places where ground-surface coal was available and firewood was scarce, but a widespread reliance on coal for home hearths probably never existed until such
13440-490: Was during the Late Paleozoic icehouse , a time of global glaciation . However, the drop in global sea level accompanying the glaciation exposed continental shelves that had previously been submerged, and to these were added wide river deltas produced by increased erosion due to the drop in base level . These widespread areas of wetlands provided ideal conditions for coal formation. The rapid formation of coal ended with
13560-504: Was erected in 1867, which continues to serve as the Illinois capitol today. Though it was ostensibly a " free state ", there was nonetheless slavery in Illinois . The ethnic French had owned black slaves since the 1720s, and American settlers had already brought slaves into the area from Kentucky . Slavery was nominally banned by the Northwest Ordinance, but that was not enforced for those already holding slaves. When Illinois became
13680-509: Was established in 1969. The conference consisted of four schools from the Quad Cities area, one from Quincy, and one from Galesburg. The charter members were Moline High School, Rock Island High School, Rock Island Alleman High School, United Township High School (East Moline), Quincy Senior High School, and Galesburg High School. Enrollments have ranged from over 2000 students, to Alleman, the league's only private school, with about 300. Prior to
13800-550: Was once known as "steam coal" as it was widely used as a fuel for steam locomotives . In this specialized use, it is sometimes known as "sea coal" in the United States. Small "steam coal", also called dry small steam nuts (DSSN), was used as a fuel for domestic water heating . Coal played an important role in industry in the 19th and 20th century. The predecessor of the European Union , the European Coal and Steel Community ,
13920-580: Was submerged beneath a shallow sea and located near the Equator. Diverse marine life lived at this time, including trilobites , brachiopods , and crinoids . Changing environmental conditions led to the formation of large coal swamps in the Carboniferous . Illinois was above sea level for at least part of the Mesozoic , but by its end was again submerged by the Western Interior Seaway . This receded by
14040-614: Was topped by a structure thought to have measured about 105 ft (32 m) in length and 48 ft (15 m) in width, covered an area 5,000 sq ft (460 m ), and been as much as 50 ft (15 m) high, making its peak 150 ft (46 m) above the level of the plaza. The finely crafted ornaments and tools recovered by archaeologists at Cahokia include elaborate ceramics, finely sculptured stonework, carefully embossed and engraved copper and mica sheets, and one funeral blanket for an important chief fashioned from 20,000 shell beads. These artifacts indicate that Cahokia
14160-492: Was truly an urban center, with clustered housing, markets, and specialists in toolmaking, hide dressing, potting, jewelry making, shell engraving, weaving and salt making. The civilization vanished in the 15th century for unknown reasons, but historians and archeologists have speculated that the people depleted the area of resources. Many indigenous tribes engaged in constant warfare. According to Suzanne Austin Alchon, "At one site in
14280-430: Was used for electricity generation. Coal burnt in coal power stations to generate electricity is called thermal coal . It is usually pulverized and then burned in a furnace with a boiler . The furnace heat converts boiler water to steam , which is then used to spin turbines which turn generators and create electricity. The thermodynamic efficiency of this process varies between about 25% and 50% depending on
14400-541: Was −38 °F (−39 °C), recorded on January 31, 2019, during the January 2019 North American cold wave at a weather station near Mount Carroll , and confirmed on March 5, 2019. This followed the previous record of −36 °F (−38 °C) recorded on January 5, 1999, near Congerville . Prior to the Mount Carroll record, a temperature of −37 °F (−38 °C) was recorded on January 15, 2009, at Rochelle , but at
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