Environmental Protection Agency will impose limits on emissions from aircraft engines

WASHINGTON — Jet engine exhaust from airliners endangers human health and adds to climate change, the government found Monday in taking the first step toward regulating those emissions.

The Environmental Protection Agency said it will use its authority under the Clean Air Act to impose limits on aircraft emissions. Jet engines spew significant amounts of greenhouse gases, including carbon dioxide and methane, into the upper atmosphere, where they trap heat from the sun. But proposed rules such as imposing fuel-efficiency standards have faced stiff opposition from aircraft makers and commercial airlines.

Aircraft emissions were not addressed as part of the landmark global climate agreement agreed to in Paris in December. “Addressing pollution from aircraft is an important element of U.S. efforts to address climate change,” said Janet McCabe, EPA’s acting assistant administrator for air and radiation.

McCabe said aircraft are the third-largest contributor to greenhouse gas emissions in the U.S. transportation sector, and that is expected to increase.