I think that we should use solar, wind, wave, geothermal, and hydro-electric power as much as we can, where we can.
It doesn't matter if it isn't 100% available.
Every bit we can cut coal and other from-the-ground sources of generating power seems like a good idea to me.
Lets not throw the baby out with the bathwater.
I'm not a greenie, but I think technology is a great answer to problems.
Someday, we'll find a power source better than anything we know today. Until then, we should experiment with different things and see how far we can push those technologies we already have.