Speedy growth of electric cars will challenge automakers

2017 Chevrolet Bolt EV pre-production vehicles at Orion Township Assembly Plant, March 2016Estimates of electric-car market share over the coming decades vary wildly, but certain trends seem to be working in their favor. Battery prices should continue to fall, and tougher global emissions standards may put increasing pressure on automakers to build larger numbers of electric cars. But can automakers handle a sudden increase in...