The United Nations Climate Change Conference begins next week after President-elect Donald Trump’s election win. Trump has promised to withdraw again from the Paris climate accords and called global warming a hoax.

As the U.S. prepares for another Trump administration, one area unambiguously in the incoming president’s crosshairs is climate policy. Although he has not released an official climate agenda, Donald Trump’s playbook from his last stint in the Oval Office and his frequent complaints about clean energy offer some clues to what’s ahead.

Trump has called climate change a “hoax,” he pulled the United States out of the 2015 Paris climate accord during his first term and has said he would do so again. He has also pledged to expand oil and gas production, eliminate subsidies for clean energy and electric vehicles, and roll back regulations aimed at reducing planet-warming emissions.

Elected officials determine the next steps for climate policy. By electing Donald Trump as president, the U.S. has put him in charge of deciding our future climate. Examining his last presidential term puts what awaits ahead for climate change policy into perspective.

President-elect Donald J. Trump promised to delete climate policy. He could face pushback from Republicans benefiting from a boom in clean energy.