(Xinhua/Zuma Press photo)
A man walks in a fog-shrouded Jilin city in Jilin province. Many cities maintained alert for air pollution on February 25 after smog choked northern and central China several days earlier. That month Beijing’s air quality index, as measured by the U.S. Embassy, hit “hazardous” territory for six days in a row.
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A man walks in a fog-shrouded Jilin city in Jilin province. Many cities maintained alert for air pollution on February 25 after smog choked northern and central China several days earlier. That month Beijing’s air quality index, as measured by the U.S. Embassy, hit “hazardous” territory for six days in a row.