Obama holds favor over Trump, though the current president is viewed in a better light than ex-President Joe Biden and Hillary Clinton.

The Trump administration has proposed curbing the government’s ability to regulate greenhouse gases by unwinding rules that control emissions from fossil fuel drilling, power plants and cars. Environmental Protection Agency administrator Lee Zeldin on Tuesday announced the proposed rollback of a 2009 declaration from Barack Obama’s administration that determined carbon dioxide and other greenhouse gases were a danger to public health.

If successful, the repeal could strip away the federal government’s most powerful way to control the country’s planet-warming pollution and fight climate change.