Alan, I agree 100% - what is a reasonable response?  What always seems to be omitted in trying to answer this question is an acknowledgement of the massive benefits mankind derives from having cheap, abundant energy.  Also omitted is the fact that poverty, and energy poverty specifically, is a much more immediate threat to people's well-being than some vague threat of future climate change, which we can't do much more than speculate on at this point.  If there was an easy way to move away from fossil fuels then I would support it, but in reality there's not.  A lot of people think we can throw up a bunch of wind turbines and solar panels, but we can't, and that debate will have to wait for another day.  In my opinion, supporting nuclear energy is the most effective thing we can do today.