I'm still thinking the best way to green energy isn't through humongus constructions but through many little systems. Let's say, a house that lives on its own energy. That would be the best way to preserve environment. Of course, there will still be need to some mass production, for factories for example. But cutting domestic energy use out of a nation's bill would be good.
A house can rely upon solar panels (polluting at the production, but eventually it'll pay, and I haven't heard of a solar panel time limit yet), rain for collecting water, using this water several times (for cleaning, then for garden, etc. can't remember the exact system but it can be used four times I think), making compost out of wastes, then using the gases produced during decomposition for heat. Of course, most f it won't be possible in a city, but there could be ways to make miniatures of these systems especially for buildings.
There could even be some sort of thing like a bike plugged on a generator. You would practice sport and help the environment - though in the US you'd probably be told you help your country or something like this.
The way to make people buy it (literally) ? Making it some sort of fashion (don't know a more fitting word in English). When gangsta rappers will drive electric cars, advertisement tell you to buy the newest pocket food-recycler (more effective than before) and to grow your own Monsanto vegetables, which need almost nothing, then the environment will be safe.
People will be environmentally friendly because they'll pay for it. Now they use oil because they pay more for it.
Also, Sergius, you can't reasonably quote an article stating that 'The nuclear industry solved the nuclear waste problem decades ago.'
A couple months ago there was an article in a scientific magazine about how we should make waste storage area to make sure no one will look this way for ore or just for fun. Polluting further and saying 'Future World will deal with it' isn't exactly dealing with it. That's why sending it into space isn't nearly a solution either (more, the Earth's orbit already looks like a junk garbage).
But I must admit nuclear energy is probably the best way to go currently.
Way better than biofuels anyway. Haven't you heard of the riots, in Haiti for example, because of the food crisis ? The one who grew crops to make food sold them to make biofuels, so there wasn't enough to feed everyone, and prices skyrocketed...