Strict new federal fuel-economy and carbon-emission standards made final Tuesday are the biggest technological challenge to the auto industry since the government began regulating emissions in 1970 and mileage in 1975.
The rule sets the equivalent of 54.5 miles per gallon as the average the auto industry must achieve by 2025, up from 29.7 mpg now and 35.5 mpg in 2016.
The tough "CAFE" standard (for corporate average fuel economy), which was to be announced earlier this month, was announced Tuesday by the Obama administration on the day that Republicans' national convention got underway in Tampa.
It is "a monumental day for the American people," Transportation Secretary Ray LaHood said in announcing the final rules.
Source
USA Today