Around the world, governments and automakers are promoting electric vehicles as a key technology to curb oil use and fight climate change.GM has said it aims to stop selling new gasoline-powered cars and light trucks by 2035 and will pivot to battery-powered models.Volvo said it would move even faster and introduce an all-electric lineup by 2030. But as electric cars and trucks go mainstream, they have faced a persistent question: Are they really as green as advertised? .nytimes.com nytimes.com
