RT Book, Section A1 Fischman, Michael L. A2 LaDou, Joseph A2 Harrison, Robert J. SR Print(0) ID 1104108736 T1 Building-Associated Illness T2 CURRENT Diagnosis & Treatment: Occupational & Environmental Medicine, 5e YR 2013 FD 2013 PB McGraw-Hill Education PP New York, NY SN 9780071808156 LK accessmedicine.mhmedical.com/content.aspx?aid=1104108736 RD 2024/04/23 AB The Clean Air Act, passed in the mid-1960s, focused national attention on cleaning up outdoor air but directed little interest toward improving the quality of indoor air—even though people spend only 10–20% of their time outdoors and the rest of their time indoors at home or at work. Studies conducted during the past three decades confirm that indoor air quality (IAQ) problems can cause or contribute to a variety of symptoms and sometimes illnesses in building occupants, as well as reductions in productivity. Concentrations of some pollutants inside buildings may exceed standards established for outdoor concentrations.