I will answer your question about the 20% solution. This solution leads us to high costs and shortages. Since the timing for the mandates is somewhat in the future, the current czars may not be around when the future bites. The new czars will undoubtedly find a scape goat unless the taxpayers boot them out. The new czars will also preach conservation to make us feel guilty for consuming so much energy.
All the while riding around in their limos and private jets, no doubt. I see the "usual suspects" are beating the anti-nuclear drums again, Bonnie Raitt, Jackson Browne, et al., are out there trashing nukes and preaching about how we "don't need" nukes, we can get by on conservation and wind/solar. Conservation, eh? Well, why don't those scumwads be the ones to start? No more rock concerts or recording projects. Cripes, the energy used to put on one rock concert dwarfs that which will be used by any of us in a lifetime.