The U.S. Environmental Protection Agency plans to repeal all greenhouse gas emission standards for light-duty, medium-duty, and heavy-duty vehicles and engines in the coming days after it removes the scientific finding that justified those rules,

The US Environmental Protection Agency plans to repeal all greenhouse gas emission standards for light-duty, medium-duty, and heavy-duty vehicles and engines in the coming days after it removes the scientific finding that justified those rules,

WASHINGTON - The Environmental Protection Agency is reportedly preparing to rescind its endorsement of a landmark 2009 report that says greenhouse gas emissions endanger human health. The report forms the basis for many of the EPA standards against air pollution.