Support WBURThe big reason why the U.S. is seeking the toughest-ever rules for vehicle emissionsPlay03:46Download AudioCamila DomonoskeApril 12, 2023 ShareTraffic moves along Interstate 80 in Berkeley, Calif., on Feb. 16, 2022. The Biden administration proposed new tough emission rules so tough it would force auto makers to boost sales of electric cars to meet the requirements. (Getty Images)
