It's not just about you. All these people have left is this one city. How much fresh water and food do you think you have? Even if we're done here by then, they won't last another 50 years! That's less than a blink of an eye! It won't matter, anyway, because there's barely enough people here to sustain genetic variance.

And you can't just keep zapping in potatoes; they don't operate a trans-dimensional teleportation system.