US-ENVIRONMENT-SCIENCE-OYSTERS

Workers with the Billion Oyster Project place oysters in the waters near Brooklyn's Bush Terminal Park August 23, 2018 in New York. One sunny morning in New York, a dozen biologists and volunteers stand in knee-deep water, chucking net sacks of oyster shells down a human chain, before planting them in containers on the riverbed. Why? To build an oyster reef. The goal? To restore a billion oysters by 2035 to America's largest city -- not as a delicacy for the dinner table but in an environmental bid to clean up the notoriously filthy harbor water and generate greater biodiversity. (Photo by Don EMMERT / AFP) (Photo by DON EMMERT/AFP via Getty Images)