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Michael Pritchard: How to make filthy water drinkable
4 ago 2009
1.9M vistas
The Lifesaver Bottle Will Save Millions Of Lives : Michael Pritchard at TEDxGateway
16 feb 2012
202K vistas
Giving while Growing | Michael Pritchard | TEDxYouth@SummitPrep
13 oct 2014
2.6K vistas