PM OPS IN NIOG VALUES FOR 31 MAJOR MAINLAND CHINESE CITIES (THREE CATEGORIES: RED FOR HIGH TOXICITY, YELLOW FOR MEDIUM, AND GREEN FOR LOW TOXICITY OF AMBIENT PM) (IMAGE)

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PM OPS IN NIOG VALUES FOR 31 MAJOR MAINLAND CHINESE CITIES (THREE CATEGORIES: RED FOR HIGH TOXICITY, YELLOW FOR MEDIUM, AND GREEN FOR LOW TOXICITY OF AMBIENT PM)

Caption

PM OPs in NIOG values for 31 major mainland Chinese cities (three categories: red for high toxicity, yellow for medium, and green for low toxicity of ambient PM)

Credit

LU ZHANG, MAOSHENG YAO

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