Carmakers including General Motors Co. and Volkswagen AG are retooling their companies to make electric vehicles on the premise that their battery-powered motors are cleaner than gas-burning engines.
Are EVs really better for the environment, though? A close look at all the factors shows they are—but it’s a complex answer with some asterisks.
The environmental cost of a car includes both building it and fueling it. That means factoring in emissions associated with oil drilling and power plant smokestacks, as well as from mining metals such as nickel and cobalt that are needed for electric-car batteries.