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By TED-Ed
Published in 2013
Fresh water accounts for only 2.5% of Earth's water, yet it is vital for human civilization. What are our sources of fresh water? In the first of a two part series on fresh water, Christiana Z. Peppard breaks the numbers down and discusses who is using it and to what ends.
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2
Tsunamis can neither be prevented nor precisely predicted. But people educated about particular warning signs can save their own lives and the lives of others. Through this interactive web site, you will: learn about tsunamis, gather tips to prepare for and survive a tsunami, understand...
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3
Published in 2011
This YouTube video explains the basics of tsunamis and how to protect yourself. 
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