Ah, that's an interesting thought. What you've said is certainly a possibility, but by no means inevitable. We could voluntarily (through the use of good science), reduce our population rapidly over the next 2-3 generations. We could also live in a more ecologically conscious and sustainable manner, and teach that to the next generation.
We could also all be forced to go out in the woods and trip on mushrooms. It will definitely change your perspective. Don't think that I'm joking around. Members of many tribes that still exist, use psyllocibe mushrooms to enduce a powerful meditative state and connect powerfully with the earth spirits.