They pledged to work together but China and US disagree on division of climate change responsibility

China and the United States are playing very different tunes about how they should bear the responsibility of tackling climate change, underlining their rivalry despite this being an issue they both agreed to work together on.

In speeches delivered at the US-hosted Earth Day Summit on Thursday, US President Joe Biden said his country was not the only major polluter and that the “world’s largest economies” had to step up. But his Chinese counterpart Xi Jinping said nations had to be credible instead of constantly changing their climate policies and they had to help developing countries to tackle the crisis.