. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. N: 0000000666655 __J I I I 1 I I I I I I I L. 78 79 80 81 82 83 84 85 86 87 88 89 90 78 79 80 81 82 83 84 85 86 87 88 89 90 Year Note: There are no national or state standards for SO^ . N = number of samples. Figure 17. Trends in 24-hr maximum SOf concentrations in Illinois. c g 'to k_ ^—' c 0) o c o O 30 25 20 15 10 5 0 30 25 20 15 10 5 0 —I—I—I—I—I—I—I—I—I—I—I—I—r Whole state. N:124 127 93 86 30 4
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. N: 0000000666655 __J I I I 1 I I I I I I I L. 78 79 80 81 82 83 84 85 86 87 88 89 90 78 79 80 81 82 83 84 85 86 87 88 89 90 Year Note: There are no national or state standards for SO^ . N = number of samples. Figure 17. Trends in 24-hr maximum SOf concentrations in Illinois. c g 'to k_ ^—' c 0) o c o O 30 25 20 15 10 5 0 30 25 20 15 10 5 0 —I—I—I—I—I—I—I—I—I—I—I—I—r Whole state. N:124 127 93 86 30 46 47 49 36 39 27 15 17 I I I I I I I I I I I I 1_ I I I I I 1 I I I I I I P Metro-East area 6 ^°^ N;13 17 17 15 455655544 I I I I I I I I I I I I 1_ I I I I 1 I I I I I I I I" 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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Keywords: ., bookcentury1900, booksubjecte, booksubjectecology, booksubjectman
