It's ironic that the best two options available now, nukes and hemp, has the liberals being all for hemp and the government all for nukes with the government being opposed to hemp and liberals being opposed to nukes. For the life of me I can't think of a better way to write that

Greenpeace and the no-nukes movement in general has lost much of their enthusiasms now with many of their members agreeing that nukes are now safe. Trouble is these groups aren't going to risk losing half their members by saying okay maybe nukes can be added to the list of clean air alternatives. A definite drawback to organizations like these is how wrong they have to be before they can openly admit it.

Personally I think the solution is a few hundred pebble bed reactors and all electric cars, however bio fuels can be useful. Corn and switch grass are stupid but hemp because it has so many other environmentally friendly uses could be viable. Of course our enlightened benefactors would never allow the evil hemp to be used.

The engineered cells that the link I provided talks about use sunlight and C02 to produce octane and are far more efficient than any of the various crops without taking up farmland. They have the ability now to capture all the C02 from coal plants and that C02 could be used as feed stock for these engineered organisms.  

So, some new nukes so electric cars won't crash the power grid, C02 eating bacteria, some hemp, some wind, sun, hydro and geothermal. Build only electric, fuel cell and hybrid cars and problem solved for at least few hundred years.