. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 1810 1930 1850 1870 1890 1910 1930 1950 19?0 1990 t'----'---yi totaJ —•— irtian —**— rural Figure 18. Illinois population, 1810-1990. One hundred years after urbanization began a new u-end took hold in Illinois as people began moving to the urban fringe, the closely settled areas surrounding central cities. By 1990 as many people lived on the urban fringe as lived in central cities. ^ Figure 19 show
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 1810 1930 1850 1870 1890 1910 1930 1950 19?0 1990 t'----'---yi totaJ —•— irtian —**— rural Figure 18. Illinois population, 1810-1990. One hundred years after urbanization began a new u-end took hold in Illinois as people began moving to the urban fringe, the closely settled areas surrounding central cities. By 1990 as many people lived on the urban fringe as lived in central cities. ^ Figure 19 shows the percentage of Illinois' population residing within the central cities, urban fringe, other urban areas, and rural areas. Not only are fewer people living in rural areas, central cities, and other urban areas, but these areas are contributing a significantly smaller percentage of the total state population. Rural areas accounted for 19% of the state's popula- tion in 1960, but declined to 15% in 1990. During the same three decades, central city population fell from 42% of the state total to 37%. In other urban areas, the percentage fell from 14% to 10% over the same 30 years. The only increase occurred in urban fringe areas, which rose from 25% of the state's population in 1960 and to 37% in Figure 19. Population distribution (percentage of total) in urban areas. 1960-1990. LAND USE TRENDS The Northeastern Illinois Planning Commission (NIPC) has estimated that between 1970 and 1990 the population of the six-county region of Cook, DuPage, Lake, Kane, McHenry and Will grew 4%, while the number of households grew 20% and residential, commercial and industrial land grew by 51%.^ In 1970, these three categories accounted for 45% of the area's developed land — the estimate does not include land used for streets, public open space, transportation, communications, utilities, and mining. By looking at the Census of Agriculture data on the 2 According to the Burea
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Keywords: ., bookcentury1900, booksubjecte, booksubjectecology, booksubjectman