提亚特河的泡沫污染在河流流经水坝的地方尤为严重，正如9月2日在皮拉波拉的邦热苏斯所拍摄到的照片一样。
The Tietê River's foamy pollution is especially intense in areas where the river passes through dams, such as in Pirapora do Bom Jesus, pictured on September 2.
皮奇先生说，人工合成的发动机声音甚至有助于减少噪音污染。
Synthesised engine noises could even help reduce noise pollution, says Mr Peachey.
库德拉检测了城市污水处理工厂的样本，并没有发现高难度的尿素。 但是曽有化粪池泄露污染切萨皮克湾和墨西哥湾。
Sewage-treatment plants tested as part of Kudela's study did not discharge much urea, but leaky septic tanks have been known to dump urea into the Chesapeake Bay and the Gulf of Mexico.
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