“The U.S. is regulating greenhouse gas emissions from commercial aircraft for the first time. But critics are saying the rules will be ineffective.
The Environmental Protection Agency said Monday the rules are being finalized after first being made public in July.
The rules — modeled after international standards — require aircraft manufacturers to use fuel-efficient engines that release less heat-trapping carbon dioxide.
They require all new aircraft sold to commercial airlines to meet the requirements by 2028. The EPA acknowledges many already do.”