For the second half of your question, the policy is simply a blanket ban on building new coal plants or upgrading the current ones in such a way that they consume more coal. Peak oil is not an energy crisis. It is a liquid fuel crisis.
Nuclear is inflexible and will have a hard time replacing gas in the peak role. But it works in the baseload, and I did write that nuclear should replace coal, not gas.
And among the non-renewable energy sources, gas remains a more natural complement to wind than either nuclear or coal.
The second half of the question is how to rig the system to force out natural gas. Any policy that successfully promotes wind will differentially push out coal rather than natural gas, so channeling the displacement from coal to natural gas requires an additional policy intervention. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
