Likewise wind, solar, tidal, all are horribly expensive to build and maintain compared to existing major sources of electricity. Plus, they are not alternatives, they are merely supplements. They will never be a major source of electricity, or base load. Gas is best used for peaking loads, and the wind/solar in SOME areas could also be supplements.
And you left out the cheapest most viable part of energy, conserving it. All you talk about in that post was producing it. Produce what we need, yes, but stop wasting so much of it.
Edward Mazria is an architect behind the Architecture 2030 plan, he estimates that we can cut the number of new power plants considerably if we simply do a better job of making all new buildings energy efficient.