Common sense dictates that a world population fitting inside the borders of Gambia, Jamaica, Lebanon, or the Bahamas is not capable of destroying the earth.
While it is beneficial and desirable to have a clean environment, it also is true that the Greens suffer from a severe case of myopia coupled with supremely absurd arrogance about the powers of humanity versus those of nature.
Cities have always been dirty, and always will, but that's where the most rabid environmentalists live. They are deluded by their own surroundings. It is almost funny.
I once asked a hardcore environmentalist what she saw when looking out the window of a cross-country flight. Was it people, pollution, and devastation, or green trees and arable land? She was unable to answer the question.
If they would even look around the city they could witness the resilience of nature. For example, one of the sidewalks where I walk my dog crosses a utility easement for about 200 feet. No one maitains this section and the sidewalk is cracked and coming to pieces from the weeds growing through it.