China has ratified the Paris Agreement on climate change.
The move is seen as a significant step forward in the battle against global warming.
The US is also set to ratify the deal.
President Barack Obama and China's President Xi Jinping are expected to make a joint announcement later today.
The accord sets ambitious goals and will see trillions of dollars funneled into to poor countries facing an onslaught of damage as a result of climate change.
