US rejoins fight against climate change at high level summit

Less than a week after President Joe Biden announced the return of the United States to the 2015 Paris Climate Agreement, his Special Climate Envoy John Kerry will join China's Deputy Prime Minister Han Zheng, German Chancellor Angela Merkel, French President Emmanuel Macron, British Prime Minister Boris Johnson and other leaders at the Climate Adaptation Summit.

This online event, hosted by the Netherlands, aims to set out practical solutions and plans for dealing with climate change in the period until 2030.

Ahead of the summit, more than 3,000 scientists from across the globe pressed leaders to better protect people from the fall out of global warming.

"Our fast-warming world is already experiencing major disruptions from more intense droughts, fires, heat waves, floods, destructive tropical cyclones and other extreme events", the scientists, including five Nobel laureates, said in a statement.

"Unless we step up and adapt now, the results will be increasing poverty, water shortages, agricultural losses and soaring levels of migration with an enormous toll on human life."

Climate change could depress global food production by up to 30%, while rising seas and greater storms could force hundreds of millions in coastal cities out of their homes, summit organiser the Global Center on Adaptation (GCA) said.

"There is no vaccine for climate change", GCA chair and former United Nations Secretary-General Ban Ki-moon told reporters on the eve of the event.

"It is happening much, much faster than we think, causing cascading risks and impact. Building resilience to climate change is not nice to have, it is a must have."

No binding commitments will be made at the summit, but leaders will try to set an action agenda, charting plans and proposals to create a climate resilient planet by the end of the decade.