I realized nothing would happen ; I just wanted to bring uip how some people over-estimate man's effect on the "enviroment".
The is an old sci-fi classic, written, I think, in the late 1940's, entitled "The Earth Abides." It is still in print, and the long and short of it is, there isn't anything that man can do, that the Earth can't undo is short order.
We flatter ourselves to think that our puny machinations and attempts actually have any significant long-term impacts on the global environment.