Some 600 experts arrived in Paris on Monday to begin work on the next major UN climate report. The five-day gathering gets underway in the shadow of comments by US President Donald Trump, who deems the science around global warming to be a "hoax".
French Ecological Transition Minister Monique Barbut, whose country is hosting the meeting in a Paris suburb, told the scientists their "extremely precious" work is crucial as multilateralism has weakened.
