President Biden has opened a major global climate summit with a call to other world leaders to step up to the challenge.
Joe Biden pledged to cut US emissions by at least half from 2005 levels by the end of this decade but he warned that his country couldn’t take action alone.
He told world leaders that scientists were calling this the “decisive decade” for tackling climate change and action was needed now.
The latest data shows China is the world’s biggest producer of carbon dioxide, emitting 28% of global output.
China is second biggest, producing 15% with India producing 7%.
Sophie Raworth presents BBC News at Ten reporting by science editor David Shukman and North America editor Jon Sopel.
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