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?

Canada’s Environment and Climate Change Minister Steven Guilbeault said the world needs to collectively continue fighting climate change, no matter what what President Donald Trump does in his second term.

Trump is pulling America out of the Paris Agreement, leaving the U.S. as the only major emitter not part of the treaty. It's a loss for U.S. businesses and the planet.