President Trump came into office promising to roll back rules designed to save energy and cut planet-warming greenhouse-gas emissions, including landmark regulations demanding better fuel economy from cars and trucks sold in the United States. Now, a year after federal officials began reviewing Obama-era car and truck rules, The Posts Juliet Eilperin and Brady Dennis report that the Trump administrations anti-regulation zeal may result in a far more aggressive rollback than even the auto industry wants.
The Obama rules demanded sharp increases in the overall fuel economy of…
