Chinese President Xi Jinping (R) and US President Barack Obama (L) shake hands
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Obama at G20: 'Best chance' to tackle climate change

The US and China, two of the world's biggest polluters, have ratified a global agreement on tackling climate change reached last year in Paris.

The ratification came ahead of the G-20 meeting due to begin on Sunday in the eastern Chinese city of Hangzhou.

  • 03 Sep 2016
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