The folks over at Terrapass blogged this story today:

Tesco, the largest supermarket chain in Britain, has announced that it will begin labeling all 70,000 products on its shelves with the amount of carbon generated from the production, transport, and consumption of those items.

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This is a fascinating experiment. Will people notice the labels? Will people actually choose between products based on carbon intensity?

If this works, it throws some cold water on those who argue that measuring carbon is too difficult.

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Of course, it remains to be seen how transparent and accurate their labeling is. But this will be interesting to follow.