A huge fire at...PetroChina...refinery in northeastern port city of Dalian has disaster-weary residents on edge, about yet another environmental threat… The reports also said that the fire was caused by static electricity generated by workers operating the tank…This is the fourth fire that has happened in PetroChina’s Dalian storage depot since July 2010. A fire broke out in the same refinery on July 16. Last year two fires, one in October and the other in July, broke out in another facility in Dalian. This is also the fifth major environmental disaster to hit the city...