I write news for the engineering and development organization engineeringforchange.org.
Solar thermal devices with complex and beautiful designs like this one are cooking food, drying coffee and generating electricity in developing countries. To avoid the cost of large parabolic
Swedish company Solvatten recently began distributing its user-friendly solar water sterilization jug in countries like drought-afflicted Somalia. The device disinfects up to 10 liters of water
A new design for a hydroelectric generator could cheaply light up off-grid areas. The Hydro-Electric Barrel is a spinning water wheel that floats on the water surface and turns in the current.
Some very enterprising high school students have recycled scrapped sign posts, go-cart frames, fencing, and other parts into working vertical-axis wind turbines. The students are seniors in a
A new bicycle-powered latrine pump could redefine low-cost sanitation in developing countries. The pump makes work easier for latrine shovelers, who empty a latrine's sewage pit when it's full.
This innovative new cookstove attachment solves two problems for off-grid homes: It turns the stove into a power generator and it improves kitchen air quality at the same. The attachment is a
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