Houses, not Housing.
The human population has increased by 5 billion people in less than 100 years.
Assuming the stuff on the right is built somewhere in the west with western zoning laws, the stuff on the left has equal density to the stuff on the right because the stuff on the right has mandatory green space that is wholly unfit for human use.
Can confirm. Source: living in the west with western zoning laws.
Two different high density zones, built in the classical (Venice) and in the modern (Vollsmose) mode. Notice the zoom level is equivalent. The area on the left has plazas and enclosed parks, the development on the right has nebulously defined “green space,” but more of it.
If you enjoyed that post, you might enjoy this article:
Place and Non-Place
It gives a certain framework from within which it is easier to understand why some public areas work even if they’re just asphalt covered, while others don’t despite being green.