Here are two very useful sites if you are doing homework
How stuff works
http://www.howstuffworks.com/
Wikipedia
http://www.wikipedia.org/
Wednesday, August 13, 2008
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The site was created by the students from the Department of Environmental, Water and Earth Science at the Tshwane University of Technology, Pretoria, South Africa. This is their way to reach out to the world with a message that they are getting ready to make a difference out there.
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