Four women and a soccer ball equals one brilliant idea called sOccket – a soccer ball that's also a portable energy-harvesting power source.

sOccket captures the energy from impact that is normally lost to the environment when the soccer ball is kicked, dribbled, thrown and stores this energy for later use. More than 1 billion people around the world rely on kerosene lamps to light their homes and businesses when the sun goes down. Not only is kerosene expensive, but its flames are dangerous and the smoke poses serious health risks. Respiratory infections account for the largest percentage of childhood deaths in developing nations – more than AIDS, and more than malaria. The inventers – four students from Harvard – are pitching sOccket as a source of clean energy derived from healthy activity

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