On April 22 ( Earth Day)vand 23, United States President Joe Biden invited 40 world leaders to a virtual Leaders Summit.
It has been five years since COP21 that led to the signing of the historic Paris Accord. But in the last five years there has been more talk and less action.
A day after the US voted for its new president, it stopped being part of the world's biggest climate treaty, the UN-backed Paris Agreement.