Sales of plug-in electric cars in the U.S. (and around the world) will grow as battery costs fall steadily. At the same time, gasoline-vehicle prices will be rising to cover the increasing costs of technology that lets them use less fuel, to keep their makers in compliance with steadily higher corporate average fuel economy rules through 2025. Bloomberg reporter Jeff Green includes in his piece a quotation from Daniel Becker, director of the Safe Climate Campaign–which lobbies for regulations that require more-efficient vehicles. “The ground is being laid for an electric car future,” Becker told him. “But it’s not an electric car present.” Many observers, including this author, feel that the true “hockey stick” upswing in sales of plug-in cars won’t come until they are roughly price competitive with gasoline vehicles in the same segment.