环保专家：中国成PM2.5污染最严重地区 (Chinese environmental experts say China has the worst air pollution in the world)
China News, July 21, 213
http://www.chinanews.com/gn/2013/07-21/5065971.shtml
Xinhua Insight: China resorts to judicial protection in green push
Xinhua News Agency, July 21, 2013
http://news.xinhuanet.com/english/indepth/2013-07/21/c_132560138.htm