The online international Climate Adaptation Summit (CAS) 2021 opens with a plenary session and speeches from global leaders and stakeholders. Chinese Vice Premier Han Zheng is expected to appear by video link at the opening ceremony, while UN Secretary General Antonio Guterres, German Chancellor Angela Merkel, French President Emmanuel Macron and British Prime Minister Boris Johnson are among the other high-level speakers. The summit is expected to see the launch of a comprehensive Adaptation Action Agenda that sets out clear commitments to deliver concrete new endeavors and partnerships to make our world more resilient to the effects of climate change.