An aerial view shows a discarded sofa on the Tiete river near Ecological Tiete Park in Sao Paulo, Brazil, March 17, 2021. The Rio Tiete, which flows like a vast open sewer though Brazil's largest city Sao Paulo, is among the most polluted in the country. Over 100 km of the river are considered dead or too polluted for almost all marine life. The stinking river, which receives hundreds of tonnes of untreated sewage and waste every day, is a black mark on Brazil's wealthiest city. Picture taken with a drone. REUTERS/Amanda Perobelli
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