If things get that bad we will start to leave this planet in ships. I think that population pressure has been a major driver for space exploration more than once in this universe. A one-way trip to mars looks a lot better on a dying planet earth.I agree, but as I implied that will only postpone the inevitable, unless the problem we solve is our numbers. If we could actually hold a level - maybe one that grows slightly as we learn how to handle more - then we might avoid the fate of the bacteria. But the world population has doubled in my lifetime and I see little reason to think humans will contain themselves.