A picture taken on June 09, 2021 at Ovive premises, a company that manufactures products from oyster shells, shows oysters in La Rochelle, western France. - In Charente-Maritime, France's biggest oyster producer, Ovive is specialised in the collect of oyster's shell since 1989. Once collected, the shells are dried to eliminate bacterias, and crushed. (Photo by XAVIER LEOTY / AFP)