. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. URBAN DYNAMICS Figure 20. Northeastern Illinois urban growth from 1980 I I 1980 MUNICIPAL BOUNDARY ^H CHANGE FROM 1960 - 1990 48. 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 Resou
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. URBAN DYNAMICS Figure 20. Northeastern Illinois urban growth from 1980 I I 1980 MUNICIPAL BOUNDARY ^H CHANGE FROM 1960 - 1990 48. 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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