Cleaning New York's filthy harbor with one billion oysters

The New York Harbor for years has been polluted and depleted of marine life. But one nonprofit is working to clean the murky water and revive its long-lost ecosystem — one oyster at a time.

The Billion Oyster Project has worked since 2014 to rebuild oyster reefs in the waters surrounding New York City. The creatures are natural purifiers: A single adult oyster can cleanse about 50 gallons of water per day. And their reefs can provide a habitat for other marine life and help protect New York's shores against storm surge during rough weather.

https://edition.cnn.com/2019/01/16/t...ect/index.html