China environment min suspends some approvals for Sinopec, CNPC
Reuters, September 3, 2013
http://www.reuters.com/article/2013/08/29/us-china-environment-oil-idUSBRE97S03G20130829
上海宝山冷库液氨泄漏致15死25伤 (15 dead, 25 injured in freezer ammonia leakage incident in Baoshan, Shanghai)
British Broadcasting Corporation, September 3, 2013
http://www.bbc.co.uk/zhongwen/simp/china/2013/08/130831_china_shanghai_chemical_leak.shtml