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A Greek flag flies as a worker shovels salt at a production site in Messolongi, western Greece, on Monday Sept. 30, 2013. Salt lakes at Messolongi are used for production by solar evaporation. The facilities are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

Salt is collected at a production site in Messolongi, western Greece, on Monday Sept. 30, 2013. Salt lakes at Messolongi are used for production by solar evaporation. The facilities are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

Two workers talk at a production site in Messolongi, western Greece, on Monday Sept. 30, 2013. Salt lakes at Messolongi are used for production by solar evaporation. The facilities at the site are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

Salt is loaded onto a truck at a production site in Messolongi, western Greece. Salt lakes at Messolongi are used for production by solar evaporation. The facilities are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

A truck transports salt along the saltworks at a production site in Messolongi, western Greece. The facilities at the site are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

Wheel traces on the salt are seen at a production site in Messolongi, western Greece. The facilities at the site are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( APTOPIX Greece Salt )

Large salt piles are seen at a production site in Messolongi, western Greece. Salt lakes at Messolongi are used for production by solar evaporation. The facilities are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

Salt is collected at a production site in Messolongi, western Greece. Salt lakes at Messolongi are used for production by solar evaporation. The facilities are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

A worker uses machinery to collect salt at a production site in Messolongi, western Greece, on Monday Sept. 30, 2013. Salt lakes at Messolongi are used for production by solar evaporation. The facilities are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

Piles of salt are stored at a production site in Messolongi, western Greece. Salt lakes at Messolongi are used for production by solar evaporation. The facilities are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

Salt is collected at a production site in Messolongi, western Greece, on Monday Sept. 30, 2013. Salt lakes at Messolongi are used for production by solar evaporation. The facilities are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )

A worker holding his shovel walks on a salt lake to a production site in Messolongi, western Greece. The facilities at the site are the largest saltworks in Greece, and are located at a protected wetland complex of estuaries and lagoons. (AP Photo/Dimitri Messinis) ( Greece Salt )