Today is Earth Day, and 40 world leaders are meeting virtually to discuss climate issues in a summit convened by US President Biden.
Russian President Vladimir Putin and Chinese President Xi Jinping are two notable leaders attending the summit, underscoring the wide range of leaders attending. Many allies of the US are also in attendance, including French President Emmanuel Macron and British Prime Minister Boris Johnson.
The US is the world's second-biggest polluter behind China, which has said it will continue to increase carbon emissions through at least the end of the decade.
CNN correspondent Fred Pleitgen reports on the latest from Moscow and answers questions about the summit.
CNN's Kate Sullivan and Kevin Liptak contributed reporting to this post.