. "Rajendra Shende, the head of the OzonAction Unit of the United Nations Environment Programme and the brain behind the idea, remembers clearly the moment when the idea struck him???during a bus ride in the western African nation of Burkina Faso in 2000.I thought that if we could develop a vaccine cooler that uses the solar energy so abundant in Burkina Faso and other developing countries, and if w" . . .