Greenhouse gas emissions for U.S. cars and trucks fell just 5% from model year 2016 through 2021 after several years of stalled improvements in fuel efficiency, a product of the Biden administration restoring rules eased by Trump officials.
— a cornerstone of its climate agenda, its primary response as the transportation sector become the country’s top source of emissions. Passenger cars and trucks alone accounted for 15% of all U.S. emissions in 2020, according to EPA data.The Alliance for Automotive Innovation, the lobbying group for automakers and suppliers, did not immediately respond to a request for comment.
But it could be years before those changes produce major improvements, analysts said. EPA said sales of electric vehicles, plug-in hybrid vehicles and fuel-cell vehicles are projected to reach 8% of production in model year 2022, up from 4% in the prior model year. “With the transition to electric vehicles, there’s a lot less resources being put into better fuel efficiency than 10 years ago,” said Jessica Caldwell, lead analyst at Edmunds, a car-shopping support company. “Automakers have hit sort of the ceiling on the levers they can pull to get better fuel efficiency for gas-powered engines that aren’t hybrid or plug-ins.
“Today’s report demonstrates the significant progress we’ve made to ensure clean air for all as automakers continue to innovate and utilize more advanced technologies to cut pollution,” the EPA Administrator Michael Regan said in a statement.
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