G20 summit: US and China ratify Paris agreement in major step for climate change fight - live

On the eve of the G20 summit in China, world leaders prepare to discuss climate change, Hinkley Point and the war in Syria 11.29am BSTObama said he believed that history would judge today’s announcement as a “pivotal” moment in the fight against climate change. The collaboration between the world’s top two economies, showed that it was possible for the US and China to work together, despite disagreements.11.25am BSTTogether the US and China account for 38.76% of the world