How to Frack Responsibly

An interesting piece by Joe Nocera in the New York Times. He points to the Environmental Defense Fund as taking the appropriately pragmatic approach to fracking. It is valuable and here to stay, so we must need to make it more environmentally friendly. Yes, of course, but how much? And how much will that cost? The question is not whether to make it more environmentally friendly - it is: What counts as being suffciently environmentally friendly?