10 Billion People
By Larry Cardoso
How would it look like?
But we can change that by not wasting so much resources. And by conserving what we have, and people should recycle more or else the earth would get more polluted which will effect us even more.
Dehydration will be another big problem, for having so many human on one earth there will be barely any freshwater left to take care of out plants and animals in any biome.