I believe this is true vindication for all people who have observed daily aerosolization of regional skies aka geoengineering aka chemtrails aka persistent jet contrails aka ruining our beautiful blue sky trails. This is IT, folks. Truth, truth, and more truth. Any persistent deniers are nothing more than corporo-fascist g-trolls.

"The correct answer defines the terms of humanity's 'Faustian aerosol bargain' (Hansen and Lacis, 1990). Global warming has been limited, as aerosol cooling partially offsets GHG
warming. But aerosols remain airborne only several days, so they must be pumped into the air faster and faster to keep pace with increasing long-lived GHGs. However, concern about health effects of particulate air pollution is likely to lead to eventual reduction of human-made aerosols. Thereupon the Faustian payment will come due."

Read the paper and watch the YouTube video. Although the paper is MUCH more clear.

[link to thinkprogress.org]