Sinkhole

By 2090, the bureau predicts one third of the city -- an area as large as Los Angeles -- will fall into the earth, and an estimated 5 million people will have been forced out of the region by the problem.

»We are nothing without the coal company,«
»All we can do is keep mining and fixing the sinkholes.«


http://edition.cnn.com/2013/07/24/world/asia/china-sinkhole-problem/index.html