Recycle Oyster Shells to Build Seawalls

New Orleans is encouraging people to eat oysters and then they're recycling the oyster shells so they can be used to build to build seawalls. Baby oysters apparently hear sounds that are related to desirable habitat related reefs which makes you feel a bit bad about eating them as baby oysters seek out places via sound via sonar. Andy says if we have a problem with the Thames overflowing we could use oyster cards because he has about 30 of them in his house.