Petroleum use, greenhouse gas emissions of automobiles could drop 80 percent by 2050: U.S. report Mar 18th 2013, 19:16 A new report finds that by the year 2050, the United States may be able to reduce petroleum consumption and greenhouse gas emissions by 80 percent for light-duty vehicles -- cars and small trucks -- via a combination of more efficient vehicles; the use of alternative fuels like biofuels, electricity, and hydrogen; and strong government policies to overcome high costs and influence consumer choices. | |