. The Changing Illinois environment : critical trends : summary report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Atmosphere â 15 Emissions of greenhouse gases are sometimes measured in "COi equivalents" to adjust for their different heat-trapping potentials. Adjusted emissions of the three major green- houses gases (methane, COi, and NiO) from Illinois sources in 1990 were some 260 mil- lion tons, down 18% since 1970. (Figure 2-8) The decline has several causes, from increased use of nuclear energy to
. The Changing Illinois environment : critical trends : summary report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Atmosphere â 15 Emissions of greenhouse gases are sometimes measured in "COi equivalents" to adjust for their different heat-trapping potentials. Adjusted emissions of the three major green- houses gases (methane, COi, and NiO) from Illinois sources in 1990 were some 260 mil- lion tons, down 18% since 1970. (Figure 2-8) The decline has several causes, from increased use of nuclear energy to more efficient use of energy overall to recent down- turns in the economy; small (and inadvertent) reductions in methane emissions have resulted from more recent bans on the disposal of yard wastes in overburdened landfills. Projections of CO2 from energy use forecast either small decreases in COi emissions or modest () annual increases through 2000. ⦠Energy efficiency has improved steadily in Illinois throughout the 1980s, and energy consumption is showing a down- ward trend. Page 15 Doing More With Less Illinois has been emitting less carbon dioxide (CO21 per unit of energy used since 1960, and CO2 generation is expected to remain fairly stable to the year 2000. This has some relevance to atmospheric quality, and thus to human health; the rate at which the atmos- phere is loaded with carbon dioxide also is affected. Those trends reflect relative declines in the use of fossil fuels for electricity generation. The efficiency with which fossil fuels are used also determines how much fossil fuel is consumed. Energy efficiency has improved in Illinois through the 1980s as it has in the rest of the This trend reverses a marked pattern of higher energy consumption evident since the 1960s. The result has been significant energy economies and cleaner air in spite of substantial increases in vehicle. miles traveled. Smaller efficiency gains in buildings and houses should
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