Beijing residents have put up with choking smog, trash-filled rivers and toxic running tracks. Now they have another concern -- sinking.
원문출처 : http://www.cnn.com/2016/06/26/asia/beijing-sinking-study/index.html
원문출처 : http://www.cnn.com/2016/06/26/asia/beijing-sinking-study/index.html