We have polluted our environment so badly already that fertility is on a global drop. Mean sperm count in the West has dropped to ~50% in the last half century.

We have polluted our environment so badly already that fertility is on a global drop. Mean sperm count in the West has dropped to ~50% in the last half century. For the rest of the world it's probably the same given how passionate so many countries are to achieve a Western lifestyle. Edit: Over the coming 50 years, the "boomers" are on their way out. This might already be enough to relax the overpopulation issue in the West. But if fertility continues to drop, there will be huge issues with ageing populations.