Trump, who: ‘“He has called global warming a “hoax,” for example, and claimed that the Chinese fabricated climate change (just a joke, he later said). And in an interview this week with Reuters, he said that he was “not a big fan” of the Paris climate accord, and that “at a minimum I will be renegotiating those agreements.”’ (New York Times, May 20, 2016).
Always “just a joke,” mind you; though, he reverses his opinion when it suits him.
The Paris Climate Change Agreement has been made into International Law on Friday, November 4, 2016. The Washington Post states: “While Hillary Clinton has vowed to honor the Paris agreement and make sure the United States continues to play a leading role in combating climate change, Donald Trump has pledged to “cancel” the accord. That might technically be difficult to do, given that the agreement will already be in force in January, but a Trump administration undoubtedly could slam the brakes on the political momentum for cutting carbon emissions, at least in the United States. And such a move would reverberate in the global community that has rallied, as never before, behind the Paris process.” (November 4, 2016)
He (and the GOP) is indeed a threat to climate change/global warming.