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enhs+660.air+pollution+slides+adobe

enhs+660.air+pollution+slides+adobe - Components of Clean...

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Components of Clean Dry Air a Element Percent by Volume Nitrogen (N 2 ) 78.08 Oxygen (O 2 ) 20.94 Argon (Ar) 0.93 Carbon dioxide (CO 2 ) 0.03 Ozone (O 3 ) Less than 0.00005 a. Small amounts (<0.002%) of neon, helium, methane, krypton and hydrogen are also present. Nondry air, of course, also has water vapor in it.
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Air Pollution Air Pollution – the discharge of undesirable physical, chemical or biological stressors into the atmosphere by natural and/or anthropogenic activities that may ultimately affect ecosystem and/or human health Historical History of Air Pollution -Early Man discovered fire - Mummies in Egypt had elevated levels of CO 2 -Medieval Governments investigated “Offensive Odors” -England (1285-1310) – 4 different commissions to Study “Foul Air” - Industrial Revolution(1600-1800s) – Single biggest source of air pollution -Contemporary Issues – Economic /human health effects
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