On Friday The Obama administration announced plans to tighten fuel-economy standards for heavy trucks, buses and vans.
That’s the transportation sector that contributes a quarter of the greenhouse-gas pollution emitted by U.S. vehicles each year.
The proposed regulations would require truck manufacturers to dramatically improve engine efficiency over the next 12 years.
It’s an effort to cut down on fuel consumption and emissions blamed for global warming.
The federal government is also fighting climate change with incentives for electric vehicles.