. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 1965 1980 1985 1990 Figure 6 Coal consumption by electric utilities in Illinois. 1965 1970 1975 1980 1985 Figure 7 BtuAb of coal consumed in Illinois. 1990 1979 Clean Air Regulations, based on the 1977 revision of the Clean Air Act, were favorable to burning the cheapest fuel, regardless of its sulfur content. This was made possible because regulations required all new plants to reduce th
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 1965 1980 1985 1990 Figure 6 Coal consumption by electric utilities in Illinois. 1965 1970 1975 1980 1985 Figure 7 BtuAb of coal consumed in Illinois. 1990 1979 Clean Air Regulations, based on the 1977 revision of the Clean Air Act, were favorable to burning the cheapest fuel, regardless of its sulfur content. This was made possible because regulations required all new plants to reduce their SO2 emissions potential by up to 90% as well as to meet the emissions limit of lbs SO2 per million Btu consumed. Only "scrubbers" could meet both requirements. Consequently, all new plants built after 1978 had to have some type of scrubber, regardless of the sulfur content of coal used. The 1990 Clean Air Act amendments reverse this virtual require- ment and allow plants to meet the same stringent emis- sion limits by freely choosing between scrubbers, fuel switching, and emission allowance trading. If high sul- fur Illinois coal is economically competitive under the new circumstances, its use will increase. The record of 10. 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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