Ozone Depletion
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A layer of ozone exists in the stratosphere which protects the earth from the sun's harmful UV radiation.  Without this layer all forms of life on earth would die.    The release into the atmosphere of chlorofluorocarbons (CFCs), found in many coolants, aerosols, solvents, fire extinquishers and chemical foams,  is the main cause of ozone depletion.   Antarctic ozone hole changes sizes over time.

If enough ozone is depleted, holes in the ozone layer such at those documented over the Antarctic and Arctic regions. (Animation from EPA)  The increase in cases of certain forms of cancer and cataracts has been attributed to the thinning of the ozone layer.  A decrease in the protective ozone layer also damages plankton, the foundation of the marine food chain, and crops.

Facts on Ozone Depletion - very comprehensive, includes pictures, graphs,data on the ozone hole over Antarctica, information on the effects of CFC's on the environment, volcanoes, and the impact of ozone depletion on humans

EPA: Ozone Depletion - includes the science behind ozone depletion and what the government is trying to about it; information on international treaties and proposed substitutes for ozone depleting substances; has a glossary of commonly used terms

Stratospheric Ozone Depletion - includes a pictures describing how ozone depletion works and common ozone myths

Greenpeace - Saving the Ozone Layer -

Impacts of the Projected Depletion of the Ozone Layer - a scientific paper on the history of ozone, the potential medical effects, and the effects on an ecosystem

Total Ozone Maps of the Northern Hemisphere - color up-to-date maps which indicate the amount of ozone over the northern hemisphere

Information Sheet   - information on the effects of UV radiation and ozone; includes graphs

 

These lists of resource links are a result of a collaboration between Eva Clement, student at the North Carolina School for Science and Math, and members of the North Carolina Sierra Club Medoc Group.
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Last updated: May 12, 2001.