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How to Make Penetrating Oil
WD 40 lubricating spray may have some low-cost, do-it-yourself competition: vegetable…
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A new mechanical grinder processes baobab fruit in…
In Benin and elsewhere in Africa, rural villagers depend on the…
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What’s wrong with our food system?
Here’s a fact that may surprise you: As many as 80 percent of the people…
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A newly designed sorghum press is under construction…
The women in Dissan, in southern Mali, turn a hand-cranked press…
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Solar Fire’s beautiful concentrators: An open source secret
Production stopped at a small solar concentrator manufacturing facility in Burkina…
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Promising new tech for developing countries at the…
A wetlands in a hair salon, a solar water purifier in…
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How to make a sack garden
A garden in a tall sack is a simple home project…
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I spent last year making fire
I spent the year developing a better way to fire bricks…
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A modular irrigation pump that grows with the…
An experimental water pump starts small and builds up with modular…
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10 Solar Cookers That Work at Night
The solar cooker is finally getting a practical overhaul. With few…