Lawsuit could mark first time NGOs file public litigation on environment [in China]…The three plaintiffs - Friends of Nature, Chongqing Green Volunteers Union and the Qujing city environmental protection bureau - exchanged evidence with Luliang Chemical Industry, the defendant…said Chang Cheng…of Friends of Nature…Luliang Chemical Industry is accused of discharging more than 5,000 metric tons of highly toxic heavy metal in three townships of Qujing…in 2011. The company did not comment on the case...