There is an interesting debate ongoing on The Economist‘s website:
It’s possible that burning gas could do more good than harm, but only in a rather special set of circumstances. The gas would have to be displacing even dirtier forms of energy – such as coal – and do so without delaying the global transition to a zero-carbon economy.
Also, while gas might be a preferable alternative to coal in the short-term, it is ultimately an exhaustible resource. In order to become sustainable, the global economy must develop a renewable energy basis for itself.