What makes you think it is unsustainable to have 11B people?
Good grief, even as we burn our rainforests to make room for grain, as we expect meat production to have to increase by 100% soon, deplete our oceans of fish, continue to back wildlife into smaller reservations as we flatten forests to build housing, have entire islands of floating plastic in our oceans, along any other of 1000 ways we our hurting our home, some folks will never be convinced.
We have lots of fossil fuels to burn, and we can produce lots of food, therefore all is well folks
China just announced they eradicated poverty and India isn’t far behind
What fine examples of how overpopulation is no biggie. A country full of slums where people shit in open air, and the biggest polluter in the world where masks were common even before COVID.