Study by Which? looked at greenhouse gas emissions as well as plastic waste and food waste
Waitrose and Lidl are the most sustainable supermarkets, according to a Which?’s eco-friendly grocer ranking.
Iceland finished last, according to the research, which tracked supermarket policies on: plastic waste and food waste, which shoppers have reported are the biggest issues for them; and greenhouse gas emissions, which most experts say poses the greatest environmental threat.
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