Cleaning Up the Tiete

 
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The Tietê River cuts through most of the state of São Paulo. It’s name in Tupi means “true waters”, but before it first appeared on a map in the mid-18th century, it was known by Amerindians as Anhembi (after a South American partridge). The river itself is said to be ten to fifteen million years old and has been used in the past by Amerindians, Bandeirantes (slave-hunters, and later miners, of the 16th-18th centuries), and clergymen. Historically, the Tietê has been used and abused more than it has been merely traversed.