I am being philosophical because we're talking in a Philosophy forum, of course

I don't litter, even though I feel that in the long run it won't matter at all. I'll pick up trash if it's in such a spot that I feel motivated to. I mean, I definitely wouldn't enjoy it personally if there was a nuclear armageddon or something but... I know we're all going to die eventually, and if it has to happen, then why worry about the particulars of how?