heavy smog, 嚴重的霧霾

Beijing, China
New high-rise buildings and heavy smog in the central business district
Photograph: Imaginechina/Rex/Shutterstock
Best photos of the day: Japanese Santa window cleaners, grazing camels in Russia | News | The Guardian
https://www.theguardian.com/news/gallery/2016/dec/21/best-photos-of-the-day-japanese-santa-window-cleaners-grazing-camels-in-russia