When the scope of the problem seems insuperable, isn't it time to call this one, give it up, and get on with life as we know it. I do know that answer to that one: that's called child abuse. When my teenager worries that her generation won't be able to fix this problem, I have to admit to her that it won't be up to her generation. It's up to mine. This is a now-or-never kind of project.