. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. O O O 0 - N:38 36 25 11 11 13 11 13 11 11 11 11 11 r I r I r t r I I 1 r 1 I 78 79 80 81 82 83 84 85 86 87 88 89 90o,o5 Note: The national and state primary standards for annual arithmetic mean SOg concen- ration are ppm. N = number of samples. —I—I—I—I—I—I—r Remainder of state. N:14 16 14 14 16 16 16 16 16 15 15 16 15 I I I I I I I I I I I I 1_ 78 79 80 81 82 83 84 85
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. O O O 0 - N:38 36 25 11 11 13 11 13 11 11 11 11 11 r I r I r t r I I 1 r 1 I 78 79 80 81 82 83 84 85 86 87 88 89 90o,o5 Note: The national and state primary standards for annual arithmetic mean SOg concen- ration are ppm. N = number of samples. —I—I—I—I—I—I—r Remainder of state. N:14 16 14 14 16 16 16 16 16 15 15 16 15 I I I I I I I I I I I I 1_ 78 79 80 81 82 83 84 85 86 87 88 89 90 Year Figure 10. Trends in annual mean SO^ concentrations in Illinois. 106. 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
Size: 2726px × 917px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjecte, booksubjectecology, booksubjectman
