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Columbia University
Nasa: Sedac: Ozone Depletion and Global Environmental Change
[Free Registration/Login Required] Mainly a thematic unit to give teachers a background in CFCs and ozone depletion, this site has a wealth of information for student research.
Other
Advanced Thermoelectric: Fundamental Thermoelectrics
Discusses the scientific principles (the Peltier effect) and the reliability and operation of thermoelectric modules. Includes a link to several other pages, one of which contains an animation of their operation.