How many destitute families are you sheltering in your home?
The world is polluted, and heating up. The most obvious parameter of that is this: the sheer number of people.
You can like people and be on board with the idea that there is such a thing as too many people in one place at one time. The extreme example of that is crowding incidents in which people die, like the one in Seoul this Halloween. No, it's not always "the more, the merrier".
Buildings, vehicles, and various structures and equipment which support or carry people all have maximum occupancies.
This may be a long-overdue self-correction.
Global infertility may just be what solves global warming.