. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 1980 DU PAGE 0 «22 WILL 1° •0023 COOK. Figure 39. Spatial distributions of 24-hr maximum SO2 (ppm) in the Chicago area for J 980, 1985, and 1990. The shaded area denotes violation of an air quality standard. 1990 133. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustration
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 1980 DU PAGE 0 «22 WILL 1° •0023 COOK. Figure 39. Spatial distributions of 24-hr maximum SO2 (ppm) in the Chicago area for J 980, 1985, and 1990. The shaded area denotes violation of an air quality standard. 1990 133. 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
