man hiker mountains lake outdoorsShutterstockPresident Donald Trump has said he believes climate change is a hoax.

So it’s no surprise that Trump’s EPA administrator, Scott Pruitt, is working to roll back the Clean Power Plan — former President Barack Obama’s signature pollution-curbing legislation.

Since entering the White House, Trump’s administration has made efforts to revoke or reverse at least 52 Obama-era environmental polices aimed at fighting the gradual warming of the planet.

Trump has called these polices “stupid” and claimed they are unfair to the fossil fuel industry. The administration’s long string of regulatory rollbacks have also been accompanied by the green-lighting of several projects that Obama had blocked because of their potential negative impacts on the climate.

Here are some of the most important changes: