If you're looking for a direct way to get involved in addressing climate change, check out 350.org. 350 was started by Bill McKibben, the author and environmentalist who first wrote about global warming in 1989. 350 is what scientists consider the safe upper limit to CO2 PPM in the atmosphere. There are local chapters all over--I'm involved in the Portland one.

I deal with the struggle you mentioned all the time. In an ideal world, I would be channelling all my energy into addressing climate change. But I have to eat, so I channel my energy into the startup world with the hope that one day I can become more deeply involved in helping solve climate change.