兰州：自来水苯污染已经得到缓解 (Lanzhou authorities say tap water pollution is under control)
British Broadcasting Corporation, April 13, 2014
www.bbc.co.uk/zhongwen/simp/china/2014/04/140413_lanzhou_tapwater.shtml
Related:
China water contamination affects 2.4m after oil leak
British Broadcasting Corporation, April 12, 2014
www.bbc.com/news/world-asia-27002602
Beijing’s bad-air days, finally counted
The Wall Street Journal, April 14, 2014
http://blogs.wsj.com/chinarealtime/2014/04/14/beijings-bad-air-days-finally-counted/