Yale Environment 360: One of President Obamas signature achievements on climate has been strict standards aimed at improving auto fuel efficiency to nearly 55 miles per gallon by 2025. But credits and loopholes, coupled with low gas prices, may mean the U.S. will fall well short of this ambitious goal.
Five years ago, flanked by auto industry executives at a Washington, D.C. auto show, President Obama announced a historic agreement to increase fuel economy and reduce greenhouse gas emissions for cars and light-duty...