Allart Ligtenberg is a retired engineer from Hewlett-Packard. His Silicon Valley garage workshop is full of shiny parabolic and box shaped solar cookers, which make the garage look like a modern art installation. He is passionate about making the use of solar cookers easier and more adaptable for rural residents of Nepal, and has been at it for about 20 years. He has recruited non-profits and villages for the cause and has even set up institutions which teach people how to make solar cookers for their own use. Read more here.