RICHLAND, Wash., July 14 (UPI) -- Off-peak electricity production could fuel 70 percent of the 220 million vehicles on U.S. roads if they were plug-in hybrid electrics, a study found.
The study, performed for the U.S. Department of Energy's Pacific Northwest National Laboratory in Richland, Wash., indicates replacing vehicles solely powered by gasoline engines with hybrids powered by off-peak electricity could improve air quality by using existing infrastructure more efficiently, the laboratory said in a news release Monday.