Lee Zeldin, the head of the Environmental Protection Agency, unveiled the move at a car dealership in the US state of Indiana on Tuesday, hailing it as "the largest deregulatory action in the history of the United States" and the "death of the Green New Scam.

EPA chief Zeldin announced plans to rescind the U.S.'s biggest tool to fight climate change in an Indy visit. Environmentalists call it a direct assault.

The EPA’s decision does not alter CT's efforts to slash greenhouse gas emissions but is likely to make it harder for it to meet its goals.