. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. AIR QUALITY TRENDS IN ILLINOIS CO c o c CD O c o O 70 60 50 40 30 20 10 0 70 60 50 40 30 20 10 0 —1—I—I—I—p—I—I—I—I—1—I r Whole state. N: 0 0 0 0 0 0 0 51 40 41 36 18 19 I I I I I I I I _1_ _I I I L. —1 1 1 1 1 1 Metro-East area -I—I—I—I—r 6 N:000 0 0 00 I I I I I I U 6 5 5 5 4 _l I I I L_ —1—I—I—I—I—1—1—I—I—I—I—I—r Chicago area. Please note that these images are extracted from scanned page images t
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. AIR QUALITY TRENDS IN ILLINOIS CO c o c CD O c o O 70 60 50 40 30 20 10 0 70 60 50 40 30 20 10 0 —1—I—I—I—p—I—I—I—I—1—I r Whole state. N: 0 0 0 0 0 0 0 51 40 41 36 18 19 I I I I I I I I _1_ _I I I L. —1 1 1 1 1 1 Metro-East area -I—I—I—I—r 6 N:000 0 0 00 I I I I I I U 6 5 5 5 4 _l I I I L_ —1—I—I—I—I—1—1—I—I—I—I—I—r Chicago area. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Dept. of Energy and Natural Resources; Critical Trends Assessment Project. Springfield, Ill. : Ill. Dept. of Energy and Natural Resources
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