Stratospheric sulfates have human cause

[knocker]

February 19, 2014 | Sulfur pollution from human activities is likely the cause of a large layer of sulfate particles, or aerosols, that form over Asia during the summer months, researchers have found. But it’s not just pollution from Asia that’s responsible.

 

http://www2.ucar.edu/atmosnews/research/11096/stratospheric-sulfates-traced-human-related-emissions