Agreed, I just wanted to preempt any "well akshually, nuclear power is perfectly clean" discussions.

The "if something goes wrong" is certainly part of my reservations. There's been more than one example of that happening in my lifetime, and one was too many.

Another concern is that we have no better idea to dispose of the nuclear waste than burying it really deep. That sounds like a good recipe to have it come back and bite future generations in the ass.

So yeah, clean and sustainable would mean solar/hydro/wind energy in my mind.