A letter in Climatic Change looking at the life-cycle greenhouse warming potential of natural gas raised a lot of hackles a little while back. If, as the authors posit, replacing coal and oil combustion with gas-fired turbines could actually accelerate global warming rather than slow it down, then we have a serious problem, given the investments being made in gas.
Much the skepticism about that study could be traced to the background of the lead author, Robert Howarth, who happens to have a history of opposing gas fracking. Of course, Howarth’s scientific credentials, or his activism, have no real bearing on the math that produces some very daunting numbers about the practical impact of drilling for gas and burning it. But it is unavoidable that any scientist who dallies even tangentially with political activism will run into problems convincing skeptics that he or she hasn’t got some ulterior motive. So what this debate needed is an unimpeachable scientific authority to weigh in.
Continue reading “Another blow to the natural gas alternative”