The U.S. dumped 500,000 tons of oyster shells into the ocean in 2007 - Nearly two decades later, they have created a thriving habitat for thousands of marine species

https://en.as.com/latest_news/the-us-dumped-500000-tons-of-oyster-shells-into-the-ocean-in-2007-nearly-two-decades-later-they-have-created-a-thriving-habitat-for-countless-marine-species-f202608-n/