. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. N:0 0 0 0 0 0 0 39 29 30 25 9 8 III II —I—I—I—I—I—I—I—I—I—I—I—I—r Remainder of state. 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
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. N:0 0 0 0 0 0 0 39 29 30 25 9 8 III II —I—I—I—I—I—I—I—I—I—I—I—I—r Remainder of state. 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. 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
