KEY POINTS
- A study by scientists from the University of Bristol, Kyungpook National University, and the Massachusetts Institute of Technology finds China responsible for much of a recent spike in the emission of an illegal greenhouse gas.
- China accounted for 40% to 60% of the global increase in trichlorofluoromethane, or CFC-11, emissions between 2014 and 2017, the study says.
- CFC-11 was internationally banned under the Montreal Protocol because it can destroy earth’s protective ozone layer.

Factories in China’s Shandong province.
Zhang Peng | LightRocket | Getty Images
There has been a rise in the emission of an illegal greenhouse gas that destroys the earth’s ozone layer — and China is responsible for “a substantial fraction” of that increase, according to a new study.
The research published on Wednesday found that China accounted for 40% to 60% of the global increase in trichlorofluoromethane, or CFC-11, emissions…
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