California officials worry about program unraveling

California officials and clean air advocates are concerned the Trump administration may attempt to unravel a key program to drive down greenhouse gas emissions from automobile fleets.

Backed by automakers, Trump officials are in talks with their California counterparts to weaken tough vehicle tailpipe standards approved by the Obama administration.

California has long enjoyed the authority to set pollution standards stronger than the federal government’s. But in testimony to a Senate committee last week, EPA Administrator Scott Pruitt left open the possibility he might seek to revoke California’s authority.