. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. QUANTITY AND QUALITY OF COAL CONSUMPTION. 1963 1970 1975 1980 1985 1990 Figure 4 Illinois' energy efficiency. Major energy savings can be achieved with every per- centage point increase in the efficiency of converting primary energy into electrical energy. Currently, about one-quarter of Illinois' total energy consumption is accounted for by losses during the generation of electric- ity. As older, l
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. QUANTITY AND QUALITY OF COAL CONSUMPTION. 1963 1970 1975 1980 1985 1990 Figure 4 Illinois' energy efficiency. Major energy savings can be achieved with every per- centage point increase in the efficiency of converting primary energy into electrical energy. Currently, about one-quarter of Illinois' total energy consumption is accounted for by losses during the generation of electric- ity. As older, less efficient power plants are replaced by newer designs (currently on the drawing boards), effi- ciency will continue to improve. New technologies such as the Integrated Gasification Combined Cycle (IGCC) could play an important role in this respect; however, flue-gas scrubbers and other conventional pollution con- trol devices consume energy and reduce the overall effi- ciency of electricity generation. QUANTITY AND QUALITY OF COAL CONSUMPTION Subhash B. Bhagwat Illinois State Geological Survey Total coal consumption in Illinois fell from 45 million tons in 1969 to million tons in 1990 (fig. 5). About 80% of the 1969 consumption was accounted for by Illi- nois coal; the rest was imported from other states east of the Mississippi. With the advent of large-scale coal min- ing in Wyoming and Montana in the 1970s, imports into Illinois increased, mostly at the expense of in-state resources. By 1980, Illinois' share of total consumption had fallen to 51%. Western coals accounted for about 38% and other eastern coals for 11% of consumption. Two factors played the most important role in this de- cline in the use of Illinois coal within the state: the low sulfur content of western coals and its low mine-mouth price. Although transportation costs often more than made up for the price difference, many utilities switched to low sulfur western coal to comply with requirements of the
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