I don't disagree with the figures but the Greenpeace folk don't have alternatives that will generate "base load". ( I'm a GP supporter and my son is a radio operator on their ships )
Sifting through what the scientists tell us it would seem that nuclear power stations can generate base load, in lieu of coal fired, as a short term alternative until technology gives us a mix of wind, wave & solar that can generate the requirement.
Here in Oz we are up to our goolies in Uranium but some time ago, >40 years ago, we signed a non-proliferation agreement which means we can sell it, but not use it. Yeah - we're pretty smart blokes here in Oz.
We sell it to China, with their "promise" that its not used for weaponary. That releases some of their own uranium for sale to Pakistan.
So, if the shit really hits the fan there, and their nuclear weapons fall into the wrong hands, you can thank us good old boys here in Oz.
Don't bother sending cards. We know the good feelings you have towards us.

JG/FME