A customer stands in a supermarket as a label of GM-free food is seen in the foreground in Moscow June 22, 2007. Moscow next week introduces a city-wide label to identify GM-free foods, a move ecologists hail as ground-breaking but which foreign producers say is complex and costly. A handful of individual food producers around the world already use labels certifying their food is free of genetically modified elements -- but this is the first large-scale political effort to introduce such a system, Greenpeace says, expecting it to be watched by others as a test-case. To match feature RUSSIA-GMFOOD/ REUTERS/Sergei Karpukhin (RUSSIA)

A customer stands in a supermarket as a label of GM-free food is seen in the foreground in Moscow June 22, 2007. Moscow next week introduces a city-wide label to identify GM-free foods, a move ecologists hail as ground-breaking but which foreign producers say is complex and costly. A handful of individual food producers around the world already use labels certifying their food is free of genetically modified elements -- but this is the first large-scale political effort to introduce such a system, Greenpeace says, expecting it to be watched by others as a test-case. To match feature RUSSIA-GMFOOD/ REUTERS/Sergei Karpukhin (RUSSIA)