President Donald Trump on his first day in office again withdrew the U.S. from a landmark global pact to fight climate change. So what is the Paris Agreement? And what happens to it now?

President Donald Trump said Monday he will again withdraw the United States from the landmark Paris climate agreement, dealing a blow to worldwide efforts to combat global warming and once again distancing the U.S. from its closest allies.

President Donald Trump has wasted no time dismantling climate policies and promising a new era of fossil-fuel dominance, withdrawing the US from the Paris Agreement on his first day back in office.