On the cost of china is where most of the huge metropolitan cities are. A city like Hong Kong is very large and very populated. Hong Kong has super crammed apartments that have only one room which is very tiny. where someone has all their belongings. These apartments could be like the size of a  Bathroom in the US.

Since so many people live here, people have to build new buildings for the amount of people who live there. That means they take up more space, killing ecosystems and causing pollution.