Legislation to reduce acid rain in early 1990s most likely had unintended effect of increasing gaseous ammonia in the atmosphere.

March 17, 2017

5 Min Read
Ammonia hot spots found over major global ag areas
This map shows global trends in atmospheric ammonia (NH3) as measured from space from 2002 to 2016. Hot colors represent increases due to a combination of increased fertilizer application, reduced scavenging by acid aerosols and climate warming. Cool colors represent decreases due to reduced agricultural burning or fewer wildfires.Credit: Juying Warner/GRL

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