Louisiana tribe uses leftover restaurant oyster shells to make barriers for historic coastal mounds

A wall of oyster shells has been erected near Montegut to protect historical Native American mounds threatened by erosion and sea level rise.

The partially-submerged wall was completed this month by the Coalition to Restore Coastal Louisiana (CRCL), Pointe-au-Chien Indian Tribe and more than 100 volunteers. They spent weeks hauling and placing about 200 tons of shells gathered from New Orleans-area restaurants.

https://www.nola.com/environment/2019/04/louisiana-tribe-protects-historic-sites-with-oyster-shells.html