Last night [Jon Stewart] interviewed [William Kamkwamba] on The Daily Show. [William] is the young man from Malawi who at the age of 14 built a windmill ... from burning his house down.

Power was scarce in William Kamkwamba's home country of Malawi, so he decided to collect his own energy. The windmill Kamkwamba built is the subject of his 2007 talk, in which he describes the ...