Restoration of Hudson River's oysters

"The restoration of New York Harbor has reached a new milestone as 2021 draws to a close: 11.2 million juvenile oysters have been added in the past six months to a section of the Hudson River off the coast of Lower Manhattan, where they are helping to filter the water and creating habitats for other marine life." New York City "was once one of the world’s great oyster capitals, exporting millions of them across the country and around the globe. They were sold from street stands, saloons and barges . . . Years of over-harvesting and environmental degradation left the waters so fouled that oysters could not even survive there for a time. Now, in addition to the ones being introduced, wild ones are being found on the bottoms of piers off the West Side of Manhattan and in the Bronx. It may be another 100 years before anyone can safely eat an oyster from the waters . . . But the oysters are a symbol of resilience, and a rare hopeful sign amid ominous news about New York waterways in the age of rapid climate change."