The rules — challenged by industry groups and states, including Texas — will reduce emissions of six heat-trapping gases from large industrial facilities, such as factories and power plants, as well as automobile tailpipes.
A three-judge panel of the U.S. Court of Appeals said Tuesday that the Environmental Protection Agency was "unambiguously correct" in using existing federal law to address global warming. The court denied two of the challenges, including one arguing the agency erred in concluding greenhouse gases endanger human health and welfare.
The court dismissed challenges to two other regulations.
The court didn't immediately release the decision, but The Associated Press obtained a copy from a participant in the case.
