Environmentalists and the Left in general have a love affair with the idea of transitioning to a future powered largely by wind & solar.  The desire to make it happen is all it takes to attract many billions in investment and subsidies, but the idea that it can actually be done rests more on wishful thinking than on critical evaluation.

Looking at the specifics of Mark Jacobson's 100% WWS plans, the first thing that strikes me is that it would be an absolutely enormous industrial undertaking, costing the US an estimated $13 trillion for the electricity sector alone when the current total value of this sector is less than $1 trillion. 
 Comparing cost & efficacy is exactly where wind & solar lose.

Sure, we can hope that new technological advances come along to help, but neither wind nor solar is new and they both have serious fundamental limitations.  And yet these are the twin pillars of the clean energy dream and advocates like OCA are completely deaf to any skepticism.