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Ricardo Azevedo walks with water from the polluted Tiete River before filling the tank of his Honda NX 200 motorbike with it in Salto, northwest of Sao Paulo, Brazil, August 6, 2015. The Sao Paulo civil servant built the motorbike, which can cover up to 500 kilometres (311 miles) fuelled by just one litre of water. Dubbed 'Moto Power H2O' the bike is powered by the process of electrolysis, which breaks the water molecule down into its constituent elements. Picture taken August 6, 2015. REUTERS/Nacho Doce
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