A crash course in changing the world.
In my class a long while ago, we had a group of students who researched a bottle called the Lifesaver. They presented the information they found to us and how the Lifesaver works. This bottles filters dangerous things in the water and when you've filtered the filthy water, you end up with a clean glass of water. The Lifesaver's pore is 15 nanometers while the smallest virus is 25 nanometers. There is no way that a virus could get through that! In the end, the filthy water turns into clear and sterile water. Children in Africa could use this easily and be safe from the diseases in the water. African women wouldn't have to walk 5 miles just to find clean water; they would have their filter right with them.
Link to TED lecture:
http://www.ted.com/talks/lang/eng/michael_pritchard_invents_a_water...
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