New York Harbor was once a haven of incredible underwater biodiversity—until centuries of pollution turned it into a cesspool. Today, an alliance of architects, restaurateurs, scientists, and high school students is working to restore the harbor and protect the city from climate change. At the heart of the effort is a tiny creature with an outsized talent for cleanup: the extraordinary oyster. WILD HOPE is a series that highlights the conservation changemakers who are sparking new hope for the future of our planet.