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THE GRAVITYLIGHT: LIGHTING FOR DEVELOPING COUNTRIES
( education / tech / help / charity )

GravityLight: lighting for the developing countries on Vimeo. This is so cool!GravityLight is a revolutionary new approach to storing energy and creating illumination. It takes only 3 seconds to lift the weight which powers GravityLight, creating 30 minutes of light on its descent. For free.And here is a less new link.Their second fundraising c... read more

  
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