环保部公布6月城市空气质量 19城达标天数不足50% (Ministry of Environmental Protection announces urban air quality for June, 19 cities meet standards less than half of the time)
Beijing News, July 31, 2013
http://www.bjnews.com.cn/news/2013/07/31/276028.html
福建PX项目爆炸背后：所属集团环保记录不佳 (Explosion at Fujian petrochemical plant reveals spotty record of corporation)
First Caijing Daily, July 31, 2013
http://news.sina.com.cn/c/2013-07-31/013827813964.shtml
Related:
Explosion hits China factory at center of influential protest
Wall Street Journal, July 30, 2013
http://blogs.wsj.com/chinarealtime/2013/07/30/explosion-hits-china-factory-at-center-of-influential-protest/