Al Gore: Shale Gas a Bridge to Nowhere...

"It is increasingly clear that the net effect of shale gas on the environment may ultimately be inconsistent with its use as a bridge fuel. Global society as a whole would find it difficult to make the enormous investments necessary to switch from coal to gas, and then turn right around and make equally significant investments to substitute were nubile technologies for gas. It strains credulity. In other words, it may be a bridge to nowhere."  Al Gore