In his first act in office, new Trump Transportation Secretary Sean Duffy signed a memorandum directing the agency to review former President Joe Biden’s fuel economy standards, which aim to reduce vehicle emissions.

The order is the latest Trump administration effort against Biden-era initiatives that intended to promote electric vehicles and reduce greenhouse gas emissions.

Duffy does not have a background in transportation, similar to Transportation Secretary Pete Buttigieg when he arrived four years ago.

New U.S. Transportation Secretary Sean Duffy signed an order on Tuesday directing U.S. regulators to rescind landmark fuel economy standards issued under President Joe Biden that aimed to drastically reduce fuel use for cars and trucks.

Sean Duffy was sworn in as the new Secretary of the U.S. Department of Transportation on Tuesday and one of his first acts in office was to sign a memorandum that begins the process of reducing automotive fuel efficiency standards enacted under the Biden administration.