Argentina and Canada, in particular, are united in opposing efforts to segregate modified and unmodified crops, such as soya beans, at source (which would mean that consumers really knew what they were buying).

ECONOMIST: Genetically modified free trade

Even when firms such as Unilever manage to find a source of, say, non-modified soya to put in their products, it tends to get contaminated with genetically modified stuff since there is so much of it about.

ECONOMIST: Sticky labels