Improving Air Quality in China’s Greater Bay Area

More than 70 million people live in China’s Greater Bay Area, a booming megalopolis that includes Hong Kong, Macau, and nine other major cities. Air pollution is a major public health concern in this region and across China. Although recent emission reductions have lowered exposure to some pollutants, other emissions have increased, and health risks persist.

Now, research by Conibear et al. suggests that policies aimed at reducing both residential solid fuel use and agricultural fertilizer emissions in rural areas outside the Greater Bay Area could improve air quality both inside the Greater Bay Area and across China.

To reach these findings, the authors performed a quantitative analysis of various…

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