ENV100Y5 Lecture : env100 note 40.docx

• School: UTM
• Department: Environment
• Course: ENV100Y5
• Professor: murk

Document Summary

Includes pesticides, which are found indoors more often than outdoors: most vocs are released in very small amounts, unclear health implications due to low concentrations. Living organisms can pollute indoors: tiny living organisms can also pollute, worsens asthma. Includes dust mites and animal dander: fungi, mold, mildew, airborne bacteria cause severe allergies, asthma, and other respiratory ailments. The ozone layer protects life on earth: ozone is destroyed and created naturally, steady state among o, o2, and o3, stratospheric ozone acts as an atmospheric blind , blind or filter = radiation is absorbed. E. g. , greenhouse gases strongly absorb in the ir wavelengths: window = radiation is transmitted. E. g. , visible light passes easily through the atmosphere: ozone strongly absorbs radiation in the shortest ultraviolet wavelengths. Almost all uv-c & most uv-b rays absorbed. There are several ways to measure o3: how much ozone is in the stratosphere, ground-based: absorption spectroscopy, satellite-based: total ozone mapping spectrometer (toms) on nimbus 7 spacecraft.