Birth control pills. City water supplies. Sewage treatment. Doesn't remove estrogen.
>Depopulation by any means!
>500 million
Proportional to current country's populations?
"The United States 2020 population is estimated at 331,002,651 people at mid year according to UN data.
The United States population is equivalent to 4.25% of the total world population."
4.25% of 500 million is 21,250,000