Iron stamps for branding champagne corks lie in a rack in the Molinas factory in Calangianus in Sardinia, the only place in Italy where cork is produced July 4, 2007. Environmentalists say cork oak forests are threatened by the rise in plastic stoppers and metal screw-tops. Picture taken July 4, 2007. To match feature ENVIRONMENT-CORK/ REUTERS/Robin Pomeroy (ITALY)