Topic: Paul Polak
Foot-powered irrigation pumps are useful but limited. Diesel pumps are expensive. Solar-powered pumps could be an answer.
He listened first, then designed products for the world's poorest people long before the term 'social entrepreneur' came into use.
09/28/2011 04:20 pm
Paula Shirk, founder of Brooklyn Bridge to Cambodia, tells of a grass-roots approach to helping poor farmers irrigate their fields.
05/04/2011 01:50 pm