One of my favorites: Bamboo Treadle Pump by Gunnar Barnes...
This is one of my favorites simple because it's designed for the everyday tasks in the work lives of people in this area.
it's a device that pumps water, and it works a lot like an eliptical! This piece syphons water from the ground by hooking pumping mehcanisms up to bamboo-made foot plcements. The user places their feet on the bamboo surfaces and moves them in a sort of bicycle-like movement. This rotates what I'm assuming are wheels that pump a method of suction. This drives the water to surface level and allows it to pour into a container.
All the parts are made of bamboo, or other products from the same region. It's cheap, affordable, and works well with little impact tot he bodies of those using it. Thus far it's definitely a design made for sustaining life (quality that is) in an impoverished region of the world.
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