एक आलू जलाएगा 40 दिन तक आपका बल्ब ! – BBC Hindi

http://www.bbc.co.uk/hindi/international/2014/12/141212_vert_fut_potato_power_du?post_id=100002601390356_775872242509482#_=_

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About narayangangurde

Social worker and an environm entalist
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