Maybe would could send some (why not a whole bunch) environmentalist wackos to the Sun. Their mission: adjust the thermostat.
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.