Quote Originally Posted by juroara View Post
When global warming was actually on the publics mind and people were actually scared about global flooding, scientists proposed a way to save mankind. They planed global aerosol spraying of aluminum, barium and other things to deflect the sunlight and effectively cool off the earth. At that time, they were not given the greenlight to proceed with the project because their plan is toxic to biological life.
I cannot imagine any real scientist proposing anything like this.

As Blueline explained, the quantities you are suggesting this occurs in are much too small to have a serious impact on global warming, especially not if you're suggesting that some/much/all of it precipitates down to the surface.