15:02 UTC+8, 2023-03-05        China's PM2.5 density, a key indicator of air pollution, fell 57 percent during the past 10 years, said Huang Runqiu, minister of ecology and environment, on Sunday.   15:02 UTC+8, 2023-03-05         China's PM2.5 density, a key indicator of air pollution, fell 57 percent during the past 10 years, said Huang Runqiu, minister of ecology and environment, on Sunday. China's carbon dioxide emissions per unit of GDP declined by 34.

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