CNNのインスタグラム(cnn) - 1月20日 04時00分

A nonprofit called the “Billion Oyster Project” is working to clean New York Harbor’s murky, polluted water by rebuilding oyster reefs in the waters around the city. Oysters are natural purifiers: A single adult oyster can clean about 50 gallons of water per day. The reefs can provide a habitat for other marine life and help protect the city’s shores against storm surge during rough weather. Above, a worker places oysters in the harbor in Aug. 2018. (?: DON EMMERT/AFP/Getty Images)

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