That's a really difficult question, and I think there's not a clear answer for that from the academic community. It's clear that gas has a lower carbon footprint per unit of energy than coal or oil does, so, from that perspective, there's potentially some opportunity, and historically I think that's what we've thought.
There have been extraordinarily rapid improvements in renewable technologies in the last decade, however, and I think that's leading a lot of people to rethink their conception of natural gas as a bridge fuel. It looks as though we may be able to leapfrog over gas in many contexts rather than having to step through gas because of how quickly renewable technologies have developed.
I'll leave it there.