"New York State's attorney general and 12 other top state law enforcement officials said on Friday they would mount a vigorous court challenge to any effort to roll back vehicle emission rules by the Trump administration.

In March, President Donald Trump ordered a review of U.S. vehicle fuel-efficiency standards from 2022-2025 put in place by the Obama administration, saying they were too tough on the auto industry.

The push to weaken the rules by the Trump administration comes as automakers are worried that consumers shift to larger vehicles and low gas prices will make it expensive or impossible to meet the regulations. They also fear a prolonged fight with states over the rules could make revising their product plans difficult."

David Shepardson reports for Reuters June 9, 2017. [2]