It is a scary thought. I've also heard things about how the insect population going down which could screw things up in the next hubdred years. And there are plenty of other bad omens out there, but I guess only time will tell as to whether or not these are really problems and if so, how catastrophic they will be. Maybe we'd be capable of colonizing other planets by now if everybody could just get along and focus. I don't know what can be said to put your mind at ease though, and I know saying don't worry about it rarely works. But I do think about this kind of thing a lot as well. And I'm only four years younger than you, so I too will probably see the fallout unfortunately.
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Remember, reality is an illusion, the universe is a hologram, buy gold, bye!