Two leading voices in the fight against climate change are at loggerheads over the weight given to "food miles" in a labelling system designed to encourage consumers to choose low-carbon products in shops and supermarkets.
The Co-operative group says it makes "no sense" for the Soil Association to focus so much on air freight which is often a relatively small part of the total environmental impact of a product and risks increasing poverty in places such as Africa which needs planes to carry some goods to markets.