Associated Press: Unions and environmentalists have found one point of agreement in the bitter debate over the natural gas drilling boom: fixing leaky old pipelines that threaten public health and the environment. It's a huge national effort that could cost $82 billion.
The leaks are a problem because methane, the primary component of natural gas, is explosive in high concentrations and is also a potent greenhouse gas that contributes to global warming.
The Department of Transportation estimates that more than...