Dunno about warming
There is another reason here too. It just does not work if nature goes haywire.
Let's see how renewables fare against the backdrop of what we have this year in continental Europe. Let's take Southern and South Eastern Europe, shall we? Sunshine for 6+ months a year, perfect for solar, nice steady breeze along coasts, perfect for wind, etc. Some agricultural surplus for renewable fuels too.
So how does this look this year as an example of climate change. This year the rain started in March and stopped last week. There was one sunny week - in August. Rain every day, every second day an inch of rain, every week at least one deluge with several inches at a time.
Solar - you gotta be kidding.
Biofuels - you gotta be kidding too. Last week I drove on a road between what used to be two sunflower fields for the last 20 years (used for biofuel in the last 10). The water was draining off one paddy field (looking like Vietnam) into another across the road in a nice steady 5 cm sheet. That was on a hill by the way, the ones further down looked like a lake.
Wind - well, that may produce something, maybe. But that is just one reneweable and a flimsy one too. Goes to show - if nature decides to start toys out of the pram ALL of our renewable strategy is immediately OUT of the window.
There _IS_ a renewable that can be made to work and one which has enough energy to run the whole Earth civilization for the foreseable future - it is the world oceans thermal gradient. However, we do not have a clue on how to exploit it and we are not investing into figuring out how to exploit it. So as long as we are not doing it, we might as well stick with something we can build to withstand Nature being pissed off - Nuclear (do not point Fukushima at me, that was _NOT_ built properly, other Japan nuclear stations with correct designs shrugged off the tsunami).