RIO DE JANEIRO, BRAZIL - FEBRUARY 06: View of Maracana Stadium during the 2014 FIFA World Cup Stadium Operators Workshop and Maracana Tour on February 06, 2014 at Maracana Stadium in Rio de Janeiro, Brazil. Some of the water that falls on the roof is collected and drained by 60 concrete troughs into a suction vacuum. It then goes into two underground filtered tanks for treatment and non-potable use in bathrooms. (Photo by Buda Mendes - FIFA/FIFA via Getty Images)
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FIFA Buda Mendes - FIFA