To some oysters are a delicacy, but to environmentalists they may be the key to saving the Chesapeake Bay.
In pre-Colonial times, there were so many oysters in the Chesapeake, that their natural water-filtering mechanisms required only four days to clean the bay. Since then, the number of oysters has declined 96 percent and it now takes them a full year to achieve the same result.
Even though Roy Hoagland with the Chesapeake Bay Foundation says the situation remains dire, he notes the oyster population is increasing thanks to human intervention.
David Schultz reports...