The Environmental Protection Agency is proposing new rules to slash vehicular emissions and speed up the transition to electric cars. The Biden administration is unveiling the proposal today, which will require two-thirds of new cars and a quarter of new heavy trucks to be all-electric by 2032. The auto industry has said the tight timeline could result in significant job and profit losses, but analysts say such measures are needed for the U.S. to stand a chance at reducing its emissions at a pace that could avert the worst of the climate catastrophe.