Rules intended to protect people from pollution are simultaneously saving the lives of whales by slowing down cargo ships, but researchers say more still needs to be done.
The effect of lax federal fuel standards on the climate fight depends largely on the fate of the California waiver.
U.S. regulators are now dinging Volkswagen for cheating on nitrogen oxides emissions tests. Data shows that officials are right to be upset.
Fuel economy is a great idea, unless you’re counting on the taxes that fuel sales generate to pay for something. Maybe there’s a better way …
A national gathering of transportation wonks try to square the circle, fitting private cars into a low-carbon economy.
Emission standards will help manage rising temperatures, but the time to act is now.