A deadly factory explosion in 2007 didn’t kill Ren Guanying. Nor did the chlorine gas leak that sparked mass panic in 2010. When countless smaller industrial accidents struck this smog-choked belt of Jiangsu province over the years, they spared her, too. The 58-year-old factory worker’s luck ran out on March 21. An explosion at Tianjiayi Chemical Co. ripped through an industrial zone and the surrounding countryside, killing at least 78 people and injuring more than 600. Ren’s body was found on a country road not far from a 300-foot-wide crater, said her daughter, Ma Li. “We used to always worry whenever we heard a blast, until we got numb to it,” Ma said in her […]