Vowing to end the “assault on the American auto industry,” President Donald Trump promised to reopen a federal review of fuel economy standards that was concluded in the waning days of the Obama administration. Today’s target is a big one: the fuel economy standards for cars and light trucks.

These rules are hardly an ideal climate policy, since they only apply to new cars (not the millions of cars already on the road), and since they’ve been undercut by cheap oil and the growing popularity of SUVs. But it’s one of the few federal programs aimed at greening the US transportation sector, which accounts for one-third of carbon dioxide emissions.

In 2012, the Obama administration approved fuel economy standards that required automakers to average 54.5 miles per gallon across their fleets of vehicles by 2025 to reduce greenhouse gas emissions. A follow-up review was slated to begin this year, but the Obama administration expedited it after November’s election and determined in January that the standards were sound. In 2016, U.S. cars and light trucks were expected to average 35.5 miles per gallon.

Read the full story > USA Fleet Solutions: Trump Reverses Obama’s Fuel Economy Rules for Cars