Private companies with charity for the world’s poor as their sole focus are rare. But, refugee camps and disaster areas all over the third world benefit from the products produced by Denmark’s Vestergaard-Frandsen: PermaNet, a mosquito net impregnated with insecticide; ZeroFly, a tent tarp that kills flies; and the LifeStraw, a filter worn around the neck that makes filthy water safe to drink. (New York Times)