![Life behind a mask — China′s cities still choking on smog | Environment| All topics from climate change to conservation | DW | 18.01.2018 Life behind a mask — China′s cities still choking on smog | Environment| All topics from climate change to conservation | DW | 18.01.2018](https://static.dw.com/image/42175254_101.jpg)
Life behind a mask — China′s cities still choking on smog | Environment| All topics from climate change to conservation | DW | 18.01.2018
![A tourist wearing a face mask visits the Tiananmen Square in heavy smog in Beijing, China, 9 October 2014. Beijing raised its air pollution alert to Stock Photo - Alamy A tourist wearing a face mask visits the Tiananmen Square in heavy smog in Beijing, China, 9 October 2014. Beijing raised its air pollution alert to Stock Photo - Alamy](https://c8.alamy.com/comp/W8YFYA/a-tourist-wearing-a-face-mask-visits-the-tiananmen-square-in-heavy-smog-in-beijing-china-9-october-2014-beijing-raised-its-air-pollution-alert-to-W8YFYA.jpg)
A tourist wearing a face mask visits the Tiananmen Square in heavy smog in Beijing, China, 9 October 2014. Beijing raised its air pollution alert to Stock Photo - Alamy
![Beijing, China. 25th Dec, 2015. Students wearing masks walk on a smog-shrouded street for a school event in Beijing, Dec. 25, 2015. An orange alarm has been issued to alert smog and Beijing, China. 25th Dec, 2015. Students wearing masks walk on a smog-shrouded street for a school event in Beijing, Dec. 25, 2015. An orange alarm has been issued to alert smog and](https://c8.alamy.com/comp/FAA9DR/beijing-china-25th-dec-2015-students-wearing-masks-walk-on-a-smog-FAA9DR.jpg)
Beijing, China. 25th Dec, 2015. Students wearing masks walk on a smog-shrouded street for a school event in Beijing, Dec. 25, 2015. An orange alarm has been issued to alert smog and
![Life behind a mask — China′s cities still choking on smog | Environment| All topics from climate change to conservation | DW | 18.01.2018 Life behind a mask — China′s cities still choking on smog | Environment| All topics from climate change to conservation | DW | 18.01.2018](https://static.dw.com/image/17453243_403.jpg)
Life behind a mask — China′s cities still choking on smog | Environment| All topics from climate change to conservation | DW | 18.01.2018
![A tourist wearing a face mask against air pollution takes a selfie on the Tian'anmen Square in heavy smog in Beijing, China, 18 November 2016. A red Stock Photo - Alamy A tourist wearing a face mask against air pollution takes a selfie on the Tian'anmen Square in heavy smog in Beijing, China, 18 November 2016. A red Stock Photo - Alamy](https://c8.alamy.com/comp/W8439K/a-tourist-wearing-a-face-mask-against-air-pollution-takes-a-selfie-on-the-tiananmen-square-in-heavy-smog-in-beijing-china-18-november-2016-a-red-W8439K.jpg)