Climate Desk: It`s no secret that environmentalists are going through a bit of an identity crisis when it comes to natural gas. Celebrities including Mark Ruffalo, Matt Damon, and Yoko Ono have aligned themselves with green groups like the Sierra Club to come out steadfastly against gas because of fracking, the drilling technique that harvests most of it, citing concerns about water and air contamination. Meanwhile others, including New York Mayor Michael Bloomberg and the Environmental Defense Fund, have boosted...