Too much of the world lacks access to clean drinking water.

Too much of the world lacks access to clean drinking water. Engineer Michael Pritchard did something about it inventing the portable Lifesaver filter, which can make the most revolting water drinkable in seconds. An amazing demo from TEDGlobal 2009.
With cutting-edge nanotech, Michael Pritchard's Lifesaver water-purification bottle could revolutionize water-delivery systems in disaster-stricken areas around the globe. Full bio and more links