Grist: With the boom in shale gas opened up by fracking, theres been a lot more talk about natural gas as a bridge fuel, an energy source that could wean us off coal and smooth a transition to renewable energy. President Obama brought up this bridge fuel idea in this years State of the Union speech, a message echoed by the secretary of energy and Obamas former energy czar. The natural gas industry, too, has been saying this for decades.
But regular Grist readers will have heard the counter-arguments:...