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In Manila, the capital of the Philippines, lack of electricity keeps millions of the city's poorer inhabitants in the dark. Metal rooftops on the city's slum houses also block natural daylight, but students from the Massachusetts Institute of Technology have found a cheap and elegant solution to the problem: plastic water bottles.
By filling a plastic bottle with water and bleach (to prevent algae from growing), students and residents can fashion a solar lamp that fills even the gloomiest shelters with light.
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In the mood for a little inspiration? Then we suggest you tune in to i.am FIRST: Science is Rock 'n' Roll, a special airing this Sunday (August 14) at 7pm ET on ABC. Created by Black Eyed Peas singer and rapper Will.i.am, the program will feature a star-studded lineup including Bono, Jack Black, Miley Cyrus, and more.
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