Fifteen beavers were released into the Arizona desert after the San Pedro River became a dry channel; in four years they built more than 30 dams, recharged aquifers, created wetlands and increased bird populations by 50%, practically single-handedly reviving the waterway - CPG Click Petróleo e Gás

[(Sherrill)]

https://en.clickpetroleoegas.com.br/Fifteen-beavers-were-released-into-the-Arizona-desert-after-the-San-Pedro-River-became-a-dry-channel%3B-in-four-years--more-than-30-dams-were-built.-btl96/

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