President Donald Trump dismissed climate change as "the greatest con job" in the world during his address to the United Nations General Assembly, doubling down on his scepticism of global environmental initiatives and multilateral institutions.
Scientists say climate change is real, mostly caused by humans, and getting worse. They point to rising temperatures, stronger storms, and melting ice as clear signs.
Groups like the UN have warned that waiting too long to act could cause serious damage to the planet and people.
Trump spoke for several minutes out of his near-hour speech on Tuesday on climate change during his address to the United Nations General Assembly, criticising the European Union for reducing its carbon footprint, which he claimed has taken a toll on its economy, and warn