"PITTSBURGH -- The boom in natural gas drilling has cast two opposing documentary filmmakers in unlikely roles."

"The number of spills and other accidents from railroad cars carrying crude oil has skyrocketed in recent years, up from one or two a year early in the previous decade to 88 last year."

"A landmark federal study on hydraulic fracturing, or fracking, shows no evidence that chemicals from the natural gas drilling process moved up to contaminate drinking water aquifers at a western Pennsylvania drilling site, the Department of Energy told The Associated Press."

"Reports that would reveal whether Exxon properly maintained its Pegasus pipeline are being kept from the public. The data has national ramifications."

"SAVAR, Bangladesh — On the worst days, the toxic stench wafting through the Genda Government Primary School is almost suffocating. Teachers struggle to concentrate, as if they were choking on air. Students often become lightheaded and dizzy. A few boys fainted in late April. Another retched in class."

"Tokyo Electric Power Co. has started taking measures to contain highly radioactive groundwater at the Fukushima No. 1 nuclear plant, but its strategy is based on a theory that is disputed by industry experts."

"Royal Dutch Shell Plc has agreed to cut pollution at its joint-venture 327,000 barrel per day (bpd) refinery in the Houston suburb of Deer Park, Texas, according to an announcement on Wednesday by the U.S. Justice Department and U.S. Environmental Protection Agency."

"LITTLE ROCK, Ark. -- An independent report blames manufacturing defects for the failure of an ExxonMobil pipeline that sent 150,000 gallons of crude oil into the small town of Mayflower, the company said Wednesday."

"A natural gas leak in the Gulf of Mexico has left a four-mile-wide "rainbow sheen" on the water's surface south of Louisiana, the Coast Guard said Tuesday, but the owner of the well said it expects the leak to be plugged within a day."

"RICHMOND, Va. — Washington, D.C., and states within the Chesapeake Bay watershed are making progress to reduce pollution flowing into the hobbled estuary but none is on track to meet cleanup commitments set this year, an analysis by environmental groups concludes."