Biofiltration -- clean water for everyone: Uzair Mohammed at TEDxUCSD 

Uzair Mohammed, a second-year bioengineering student at UC San Diego, shares his invention: a revolutionary "biofiltration" device that is grown by bacteria in sugar water that provides clean water at a fraction of the cost, and reminds us that anyone can do what he did with just a little vision and dedication.
In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)