Bruce Buchanan, 2007
Seven years ago, teacher Carol O’Brien was concerned about the indoor air quality at her school, King-Murphy Elementary in Evergreen, Colo. “Our school sits on a steep hillside and the buses delivered kids below the school. Air currents being what they are, the exhaust traveled up the hill and into the school,” O’Brien says. In addition, she saw furnace filters in her classroom “dripping with dust” and realized that mold and other airborne contaminants were circulating through the air.
