[fusion_text]William E. Leonhard Professor Harold Hemond has studied Thoreau’s Bog, named after Henry David Thoreau, for four decades looking at airborne metals, nutrients, trace gases, and atmospheric acids released by society and analyzing the chemical footprint left behind. Hemond and his students are working as part of a team with members of the Chemistry and Biological Engineering departments; the team is supported by MIT’s Environmental Solutions Initiative (ESI) and is analyzing how new environmental chemicals can affect the health of humans. Read more about the research in the fall 2016 edition of MIT Spectrum.[/fusion_text]