. The Changing Illinois environment : critical trends : summary report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Atmosphere • 11 Figure 2-3 Percentage Change in Transportation Emissions 1973-1992 Total Transportation Rural Counties Other MSA' Collar Counties Cook. -50% -40% -30% -20% -10% 0% 10% 20% *U,S. Census Bureau Metropolitan Statistical Area, ottierthan Coolt and Collar Counties Figure 2-4 Vehicle Emissions Statewide 1973-1991 5, - - 3, 2, Please note that these i
. The Changing Illinois environment : critical trends : summary report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Atmosphere • 11 Figure 2-3 Percentage Change in Transportation Emissions 1973-1992 Total Transportation Rural Counties Other MSA' Collar Counties Cook. -50% -40% -30% -20% -10% 0% 10% 20% *U,S. Census Bureau Metropolitan Statistical Area, ottierthan Coolt and Collar Counties Figure 2-4 Vehicle Emissions Statewide 1973-1991 5, - - 3, 2, 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; Nature of Illinois Foundation. [Springfield, Ill. ?] : Ill. Dept. of Energy and Natural Resources, the Nature of Ill. Foundation
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