New York Times: After my column on Wednesday about how the nations natural gas boom is helping reduce emissions of heat-trapping carbon, I received a bunch of e-mail arguing that gas obtained by hydraulic fracturing could, on the contrary, worsen climate change.
The main reason is that fracking wells -- where water, chemicals and sand are pumped at high pressure into horizontal shafts to fracture shale rock deep underground -- leak.
Cheap natural gas is helping to cut carbon emissions because power companies...