Some of the millions of oyster shells that Americans are used to throwing away are now rebuilding the coast where they came from. 

The Coalition to Restore Coastal Louisiana, a non-profit advocacy organisation, has collected more than 1,300 tonnes of oyster shells from dozens of restaurants.

They end up in wire containers used to build an 800-metre barrier reef along the Biloxi Marsh, a part of the Mississippi River Delta that has seen significant erosion.  

Al Jazeera's Jonathan Martin reports from Buras. 

Source: Al Jazeera