. 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 I I I I I I I I I I I I I âI 1 1 1 1 1 1 T Remainder of state nâIâIâr. N:00 0000 066 66S5 I r I I I I 1 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 NO3". N = number of samples. Figure 15. Trends in 24-hr maximum NO^ concentrations in Illinois. c g â ^ i_ +-» c o o c o O 10
. 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 I I I I I I I I I I I I I âI 1 1 1 1 1 1 T Remainder of state nâIâIâr. N:00 0000 066 66S5 I r I I I I 1 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 NO3". N = number of samples. Figure 15. Trends in 24-hr maximum NO^ concentrations in Illinois. c g â ^ i_ +-» c o o c o O 10 9 8 7 6 5 4 3 2 1 0 10 9 8 7 6 5 4 3 2 1 0. 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
