4. Destruction of Ozone (oxygen atoms) in the stratosphere (layer in atmosphere) caused mainly by release of CFCs Ozone Depletion Definition Important!
6. Act as a shield , Protection from harmful Ultraviolet rays from the sun
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10. Extent – How serious is the problem? 1.Arctic (North pole) – Thinning of the ozone layer + small hole 2.Antarctica (South pole) – Bigger and deeper hole in the ozone layer Which is more serious?
11. Consequences of Ozone depletion Human Health Skin cancer, cataracts, Weakens immune system Marine Food Chain UV kills plankton (marine food) Affects food chain Global Climate Increase global warming due to Increase UV (less plankton = > CO2) Damage materials UV radiation deteriorate materials eg Plastics, PVC Affect Plant Growth & Reduce Crop production (UV stump growth) Important text pg 169
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16. Less effective More effective Which is more effective? Why? What is the purpose of it? Kyoto Protocol Montreal Protocol Reduce emission of greenhouse gas (Global Warming) Limit the production and use of CFCs (Ozone depletion) Limiting GHG = controlling burning of fossil fuel (affects industrialization and economic productivity). Limiting CFC products will not affect economy growth
![Watch the video and answer the question 1. How serious is Ozone depletion? 2. What causes Ozone depletion? ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)