HARRISBURG, Pa., Sept. 23 (UPI) -- Gas extraction from Marcellus Shale and oil and gas pipeline problems in the United States are cause for safety concerns, a Pennsylvania lawmaker said.
U.S. Sen. Bob Casey, D-Pa., in a letter to the U.S. Department of Transportation's Pipeline and Hazardous Materials Safety Administration raised concerns about the safety record for pipelines and gas extraction in his state.