05_Tragedy and Ozone S11

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Unformatted text preview: Page 1 101-1 102-8 101-2 102-6 103-12 102-7 101-5 102-10 101-4 102-9 105-17 105-18 103-11 105-16 103-13 101-3 103-14 103-15 105.19 Page 2 Page Feedback on critical analysis? Project #1 now on elms frst checkpoint due in one week Tragedy of the Commons Tragedy of the Commons Page Crticisms of T.o.t.C? Tragedy of the Commons as the Earth Collapse of the Cod Fishery TANSTAAFL Electromagnetic Spectrum Ozone is? Ozone - an interesting example of a global problem The Atmosphere Life and UV Radiation DNA molecules have resonances at 265 nm Proteins have resonances at 275-285 nm UV at or below these wavelengths is absorbed, breaking molecules and damaging cells- UV at 254 nm is used to sterilize equipment UV is absorbed by a few meters of water; life initially was found only in the ocean Marine plants produced O 2 , which accumulated in atmosphere; O 2 absorbs UV-C (<280 nm) O 3 produced from O 2 ; O 3 absorbs most UV-B (280-320 nm), making terrestrial life possible Ozone, Oxygen and Life Impacts of Increased UV Humans:- more melanoma and other skin cancers- more eye cataracts, photosensitivity- more sunburn, premature aging- weakened immune systems; more infection Other Life: - Cataracts in mammals, increased mortality/morbidity in animals with UV-sensitive skin- reduced plant yields (1% for each 1% decrease O 3 )- damage to ocean ecosystems Damage to plastics, other materials Ozone Absorbtion of UV Do you know someone who had skin cancer?...
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05_Tragedy and Ozone S11 - Page 1 101-1 102-8 101-2 102-6...

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