The White House proposed dramatically weakening fuel economy standards on Thursday, reversing the only major federal policy to reduce planet-warming emissions from the nation’s top source of greenhouse gas pollution.
The move would clear the way for vehicles to, by 2030, spew an addition 600 million metric tons of carbon dioxide into the atmosphere ― equivalent to the entire annual emissions of Canada.
The widely anticipated proposal from the Environmental Protection Agency and the Department of Transportation outlines what environmentalists see as a worst-case scenario for vehicle emissions.
