(the sound is very low, but the video is well worth it)
“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 turning farm waste into clean-burning charcoal.
“Amy Smith designs cheap, practical fixes for tough problems in developing countries. Among her many accomplishments, the MIT engineer received a MacArthur “genius” grant in 2004 and was the first woman to win the Lemelson-MIT Prize for turning her ideas into inventions.” (TED)