Weak citizens dying of air pollution quickly and being replaced by healthy strong new recruits from the hundreds of millions living in the China villages. Very

Weak citizens dying of air pollution quickly and being replaced by healthy strong new recruits from the hundreds of millions living in the China villages. Very similar the recipe for big cities in Europe before the industrial revolution. There was no canalization, food had to be brought on horse cars without refrigerators from vast areas, making it decay. A dozen people per room, resulting in fast spreading of viruses and bacteria.