Amy Smith: Simple designs that could save millions of childrens' lives

Fumes from indoor cooking fires kill more than 2 million children a year in the developing world. MIT engineer Amy Smith details an exciting but simple solution: a tool for converting farm waste into cleaner-burning fuel. Plain-spoken and passionate, Smith talks about some other tools she and her students are creating, including an incubator that stays warm without electricity and a grain mill that frees women from hours of grinding every day. These are basic tools with world-changing results. (Filmed Feb 2006)

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