The hundred or so fish suppliers sitting in Sainsbury's central London auditorium in late April may have come from every corner of the globe, but there was only one thing on their collective mind – can my business survive the sustainability onslaught?

The occasion was Sainsbury's annual suppliers' conference, which the United Kingdom-based supermarket chain used as a platform to unveil its newly implemented seafood sourcing «decision tree.» The tree rates each source of fish as green, amber or red – and it's not hard to guess what happens to the unfortunate reds.

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