It’s Wednesday, September 23, and the world’s largest polluter has pledged to zero out its emissions.

President Xi Jinping stands before a cut-out of China reading "net-zero."

Lately, everyone and their mother has been pledging to cut their carbon emissions to “net-zero” — even oil giants like BP and Shell. Now, the world’s biggest polluter is getting in on the game: Chinese President Xi Jinping vowed that his country will reach net-zero carbon emissions by 2060.

Reaching net-zero will be no small task for China, which currently emits around 10 billion metric tons of carbon dioxide every year — almost double the emissions of the U.S. — and is still building new coal-fired power plants. China hasn’t released any information about how it intends to reach its new goal; President Xi merely promised that the country’s carbon emissions will peak before 2030 and decline from then on.

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Still, it’s a promising sign — and puts even more pressure on the U.S., which has yet to deliver a similar pledge. Tuesday’s announcement came less than an hour after President Trump, appearing at the same virtual United Nations General Assembly as President Xi, railed against China’s environmental record and defended his decision to withdraw the U.S. from the 2016 Paris Agreement.

“On a global commons issue, China has moved ahead regardless of the U.S.,” said Li Shuo, a Beijing-based senior global policy advisor for Greenpeace, in a statement. “Will Washington follow?”

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