Environment News Service: Cars around the world will one day be propelled by electric motors, transportation expert Daniel Sperling told a meeting of international transportation experts and policymakers in London today. Sperling said the transformation of automobiles and the entire automotive industry has begun with gasoline-electric hybrids, and will continue in the next decades with the wide adoption of plug-in electric hybrids, battery-only electric cars, and fuel cell electric vehicles. Director of …