Griffin, Robert J.2013-08-022013-08-022013Griffin, Robert J.. "The Sources and Impacts of Tropospheric Particulate Matter." <i>Nature Education Knowledge,</i> 4, no. 5 (2013) Nature Education: 1. <a href="https://hdl.handle.net/1911/71725">https://hdl.handle.net/1911/71725</a>.https://hdl.handle.net/1911/71725Aerosols vary in composition, size, concentration, and source. They profoundly affect climate, visibility, human health, and biogeochemical cycling.engJournal article