An aerial view of buildings being demolished in Zhengzhou city, Central China’s Henan province, July 29, 2015. Dust from construction sites is thought to be one of three main reasons for Zhengzhou’s poor air quality, which continually ranks as the second worst in China. The city has more than 2,100 construction sites and a total area of 71 million square meters of buildings being demolished. Netizens joke that Zhengzhou looks like an earthquake-hit zone from the air.(Photo/CFP)
