. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 1 1 I 1 1 1 T" 1901 1911 1921 1931 1941 1951 1961 1971 1981 Year -*— Moline Peoria -A- Springfield Figure 46. Number of days per five years when smoke and/or haze was reported at Moline, Peoria, and Springfield (abscissa date in the first year of the five-year periods). 1400. 0"H—I—I—r—I—I—I—I—I—I—I—I—I—I—r—I—n 190119111921 1931 1941 195119611971 1981 Year Chicago --+— —A - Evans
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 1 1 I 1 1 1 T" 1901 1911 1921 1931 1941 1951 1961 1971 1981 Year -*— Moline Peoria -A- Springfield Figure 46. Number of days per five years when smoke and/or haze was reported at Moline, Peoria, and Springfield (abscissa date in the first year of the five-year periods). 1400. 0"H—I—I—r—I—I—I—I—I—I—I—I—I—I—r—I—n 190119111921 1931 1941 195119611971 1981 Year Chicago --+— —A - Evansville Figure 47. Number of days per five years when smoke and/or haze was reported at Chicago, St. Louis, and Evansville. 57. 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
