Synthetic gas would cut air pollution but worsen climate damage in China

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China's smog has created a public health crisis that has led the Chinese government to declare a war on air pollution. In addition, as part of the Paris climate agreements, China has committed to peaking its CO2 emissions by 2030 or sooner. A new study led by researchers at Princeton University analyzes a conflict between these goals in China's plans to use synthetic natural gas, a fuel derived from coal that is relatively free of conventional air pollutants but the production of which increases emissions of carbon dioxide, relative to direct coal combustion.

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