. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Note: Ni measurements began in 1984. Analysis of individual filters for metals began in 1985. There are no national or state standards for Ni. N = number of samples. 1 1 n Chicago area â 1.^^ AUcL N = 0 29 30 25 Year 84 85 86 87 88 89 90 1 1 I I II â1 Remainder of State - - - - - - - o - 4. -a. ^ ^ ^ _L 1 N = 0 1 12 11 11 11 9 11 1 1 1 1 1 1 O ^â» c 0 O c o O Figure 29. Tren
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Note: Ni measurements began in 1984. Analysis of individual filters for metals began in 1985. There are no national or state standards for Ni. N = number of samples. 1 1 n Chicago area â 1.^^ AUcL N = 0 29 30 25 Year 84 85 86 87 88 89 90 1 1 I I II â1 Remainder of State - - - - - - - o - 4. -a. ^ ^ ^ _L 1 N = 0 1 12 11 11 11 9 11 1 1 1 1 1 1 O ^â» c 0 O c o O Figure 29. Trends in 24-hr maximum Ni concentrations in Illinois. 1 : r Whole State ^A X ? i N=15 17 27 17 84 85 86 87 88 89 90 Note: Ni measurements began in 1984. There are no national or state standards for Ni. N = number of Year Remainder of state ^l^O^i N=11 l_ 12 _l_ Figure 30. Trends in annual mean Ni concentrations in Illinois. _i_ 84 85 86 87 88 89 90 116. 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: 1862px × 1342px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjecte, booksubjectecology, booksubjectman
