[epistasis]

> renewables alone will not bring us into carbon free future.

They certainly can, and going 100% renewable by 2050 is feasible. [1] Once you add in nuclear, it's only more feasible (though maybe more expensive).

Taking a look at the five potential plans for the UK from 2009 [2], they are now much more potentially feasible as solar and storage technology has plummeted in price far more quickly than anticipated.

It's only a matter of political feasibility, not engineering or industrial feasibility. That's why these plans need to be reevaluated every 12 months, because technology for renewables is changing so much more quickly than any of the conventional technologies do, and the boundary for economic feasibility is quickly quickly shifting.

[1] http://web.stanford.edu/group/efmh/jacobson/Articles/I/Count...

[2] http://www.withouthotair.com/c27/page_203.shtml