The changing Illinois environment : critical trends : technical

Par un écrivain mystérieux

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Download this stock image: . The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. AIR QUALITY TRENDS IN ILLINOIS. c CD O c o O T—r—I—I—I—I—I—I—I—I—I—I—I" „ Chicago area / Standard N:44 47 25 13 14 15 14 14 14 11 11 11 11 I I I L. 78 79 80 81 82 83 84 85 86 87 88 89 90o 30 0.25 Note: The national and state primary standards for 24-hr maximum SOg concentration are both 0.14 ppm. N = number of samples. 0.20 0.15 0.10 0.05 0.00 I I I I I r. Please note that these images are extr - RJBFXP from Alamy's library of millions of high resolution stock photos, illustrations and vectors.