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Published byElijah Johnston Modified over 9 years ago
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Ozone Layer O 3 Absorbs the sun’s UV radiation Stratosphere 20-50km above the Earth’s surface
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Ultraviolet Radiation Good: Causes Vitamin D production in humans Bad: Causes skin cancer, cataracts, and mutations, blindness, sunburn. Severe crop damage Destroy microorganisms at bottom of food chain
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Ozone Depletion Antarctic Ozone Hole http://ozonewatch.gsfc.nasa.gov/
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The Chemistry CFC’s = Chlorofluorocarbons CFC’s in UV radiation release a Cl Cl + O 3 ClO + O 2 ClO + O Cl + O 2 IT’S A CYCLE!!! US Banned CFC’s in many products in 1978
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Montreal Protocol Complete Phaseout of CFC’s by 1996 Good Example of countries coming together for the benefit of the environment
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Ozone depleting substances
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Question: What does the hole in the ozone layer mean for us? What can we do to protect ourselves from UV radiation? GRAPH: How has the Antarctic Ozone Hole Changed over time???
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