Ricardo Azevedo collects water from the polluted Tiete River before he 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. (Photo by Nacho Doce/Reuters)

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. (Photo by Nacho Doce/Reuters)

Ricardo Azevedo rides his Honda NX 200 motorbike, which he converted to be powered by water, in Salto, northwest of Sao Paulo, Brazil, August 6, 2015. (Photo by Nacho Doce/Reuters)

Ricardo Azevedo rides his Honda NX 200 motorbike, which he has converted to be powered by water, in Salto, northwest of Sao Paulo, Brazil, August 6, 2015. (Photo by Nacho Doce/Reuters)

Ricardo Azevedo turns on his Honda NX 200 motorbike, which he converted to be powered by water, in Salto, northwest of Sao Paulo, Brazil, August 6, 2015. (Photo by Nacho Doce/Reuters)

Ricardo Azevedo fills with water the tank of his Honda NX 200 motorbike, which he converted to be powered by water, in front of the polluted Tiete River filled with foam in Salto, northwest of Sao Paulo, Brazil, August 6, 2015. (Photo by Nacho Doce/Reuters)

Ricardo Azevedo turns on his Honda NX 200 motorbike, which he has converted to be powered by water, in Salto, northwest of Sao Paulo, Brazil, August 6, 2015. (Photo by Nacho Doce/Reuters)

Ricardo Azevedo rides his Honda NX 200 motorbike, which he converted to be powered by water, in Salto, northwest of Sao Paulo, Brazil, August 6, 2015. (Photo by Nacho Doce/Reuters)

Ricardo Azevedo filter water from polluted Tiete River using a cafe filter before filling the tank of his Honda NX 200 motorbike with it in Salto, northwest of Sao Paulo, Brazil, August 6, 2015. (Photo by Nacho Doce/Reuters)