Environmentalists and car companies are hailing it as one of the best things President Barack Obama's done.
It's a proposed new rule, out today, to make gasoline cleaner and our air safer.
The move by the Obama EPA would impose California's tighter standards on the nation starting in 2017. Which means, less sulfur will be allowed in gasoline, resulting in lower tailpipe emissions and cleaner air.
Oil companies have a warning. They claim, the new rule would cost up to nine cents a gallon.
American Petroleum Institute, Rayola Dougher, says this will hurt us in the long run.
"At the end of the day it's billions of dollars. may not even sound like a lot -- nine cents doesn't sound like a lot. You multiply times all those billions of gallons sold it's billions of dollars we're talking about."
Car companies called the Obama move a big step forward but the move, does have GOP opposition.