Yes, it is heartening that at least some greenies are capable of maturing, that not all of them are stuck on the flat learning curve of infancy. Nuclear energy? Isn't that what the Iranians are claiming? Actually though, it's been sky high labor union costs(Davis-Bacon law, etc)that has driven nuc plant costs sky high. Now though there are better designs and nucler will certainly be part of the energy mix, just not the total answer. As to nuc-rad waste, LENR has solved that problem but vested interests in the DOE and elsewhere fight to kill that baby in the cradle.
Who knows about the culprits behind high costs? I think we'll find out pretty soon with the next plant. If memory serves lawsuits drove the cost and unpredictability of nuke plants past the point of feasibility. We'll see if that's still the case.
According to Moore, it's Greenpeace that took a hard left turn away from what he envisioned to be what environmentalism is about. They pulled a lot of stunts in the early days to raise visibility, then he said we're established now, time to work with people for sensible progress on the environment, but the rest of Greenpeace wanted to get even more radical.
What you have to understand is that most "Greenies" really don't give a damn about the environment. It's simply an issue they can use and abuse to try to tear the economy down to reach their real objective --- Marxism.