EBEKAWOPA, GHANA, 2008. We built this solar drier as a little engineering experiment. Two men brought planks on their shoulders while riding their bikes. They then planed the wood and constructed the machine per Tom's design. Tom brought a solar-powered attic fan to suck cool air through the beans, which lay on shelves made of plastic screen.
Want this picture in high-resolution? Click below to donate $5 per photo. Write picture number(s) and your email in the PayPal comments field. Tom will email you the originals once PayPal has notified him.