Report: Rising electric-car production may strain unexpected resources

Tesla Supercharger site in Rocklin, California, before expansion    [photo: George Parrott]Despite electric cars producing no tailpipe emissions, not all of their effects will be environmentally beneficial, according to a recent report by McKinsey & Co. The group, which is often optimistic about electric car adoption, forecasts that by 2030, plug-in cars will make up at least 20 percent of car sales globally, and up to 35 percent in...