What problems will be might be caused by a population being too big?

There are several factors to be honest but it will take us forever to pin-point all of them so I'll go on and name something that I think is detrimental to everyone.

1. Lack of living space - At some point the Earth's population will become to big places will become overcrowded and there will be a small amount of HEALTHY living space available for every single person in the world.

2. Pollution - When the population becomes too big, people will find a way to use up most/all of the Earth's resource and pollute the planet if we don't control the population boom in the future.

My thoughts,

RT