Here's the utter, unequivocal, honest truth:
I don't care, or at least don't spend a moment worrying, other than looking into interesting science behind what's happening. So far as I know, there is literally nothing I can do about it that I don't already do. I recycle, I drive a car that gets pretty good gas mileage, am intelligent enough to know that ditching that car for a hybrid will be a net loss in efficiency, I vote responsibly (if I can), I don't waste much, and what I do waste I try to mitigate. I pick up litter. I smoosh my beer cans. I shower instead of bathe. It's about all I can do, and I'm good with that, and refuse to feel guilty about the rest of the world. What it comes down to is be personally responsible, but at the end of the day, don't worry, be happy, and if the reaper cometh, greet him with open arms, for that is reality.
I had a friend who used to preach about the conditions in El Salvador. According to her hands-on stories, it was and is a very rough place, and she's probably right about that. I always thought that sucked, and if true, the stories of what the CIA et. al. did in the 80s are disturbing. But I have 2 kids to feed right here in my very own house. I can't care about El Salvador because it's too far outside my monkeysphere. Sorry. As always, when something affects me locally, I'm gonna ride things out and look out for my family, and I guess I just assume other people will too. Sure I'll donate to the Red Cross, but that's why I donate to them; they're equipped to deal with not only the problems, but also the sympathy of it all. And I'm not gonna feel guilty about that for 1 second. If I did, where does it end? Am I the whole world's martyr? Fuck that.
Some smarty-pants out there comes up with a "here do this everybody!" with resounding science, or barring that, something that won't take food off my table or put too many pains in my ass, I'm on board, but I'm not sacrificing my ability to provide for my wee ones to go all activist. Just not gonna.