The chemistry of the atmosphere refers to the study and understanding of the chemical composition, processes, and reactions that occur within Earth's atmosphere. Full definition
If the world continues to accept disappearing tree - cover, land degradation, the expansion of deserts, the loss of plant and animal species, air and water pollution, and the changing chemistry of the atmosphere it will also have to accept economic decline and social disintegration... such disintegration would bring human suffering on a scale that has no precedent...» 7 (religion-online.org)
This time, they'll try to answer the broader question of how the large - scale chemistry of the atmosphere has changed since pre-Industrial times. (rochester.edu)
The changing chemistry of the atmosphere and ocean by CO2 seems to be taking it that extra step leaving our distinct chemical signature all over the Earth... yes, like the layer of iridium at the end dinosaur era. (newscientist.com)