. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 09 o z X 20 15 10 5 1 1 r -| 1 1 1 1 1 r J I I I I 1 I L 8 9 10 11 12 o (0. 10 11 12 Figure 33. Seasonal variations of weekly mean airborne concentration (fig m^)for several airborne pollutants calculated from observations at Bondville, Illinois, for the period 1985-1992. 194. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 09 o z X 20 15 10 5 1 1 r -| 1 1 1 1 1 r J I I I I 1 I L 8 9 10 11 12 o (0. 10 11 12 Figure 33. Seasonal variations of weekly mean airborne concentration (fig m^)for several airborne pollutants calculated from observations at Bondville, Illinois, for the period 1985-1992. 194. 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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