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
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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