FIGURE 4.-TRENDS IN THE MIX OF ENERGY SOURCES, UNITED STATES, 1850-2000 ILLUSTRATION ADAPTED FROM COOK, EARL. "THE FLOW OF ENERGY IN AN INDUSTRIAL SOCIETY," SCIENTIFIC AMERICAN, VOL. 224, NO. 3 (SEPTEMBER 1971), P. 137. TABLE 6.-FORECASTS OF U.S. COAL CONSUMPTION WITH PERCENT OF TOTAL ENERGY CONSUMPTION • Stationary sources only, excludes transport. 7 Assumes no significant synthetic fuel production from coal in year 2000. • Assumes 44 percent of coal requirement in 2000 is for synthetic gas and liquids, and 55 percent for conventional energy uses. TABLE 7.-FORECASTS OF U.S. PETROLEUM AND NGL CONSUMPTION WITH PERCENT OF TOTAL ENERGY 1 Specifically excludes non-energy fuel use. 2 Converting the forecasted barrels of oil to B.t.u. at 5,800,000 B.t.u, per barrel. 3 Medium projection, includes agriculture, asphalt and road oil, liquid refinery gas, miscellaneous uses, and exports. 4 Stationary sources only, excludes transport. * Excluded from graph of petroleum and NGL forecasts given on following page. |