Sainsbury's pledges £1bn to cut emissions to zero by 2040
Sainsbury's has promised to reduce its net carbon emissions to zero over the next 20 years.
The supermarket chain, which is the second largest in the UK, has said it will spend £1bn to reach the target.
It pledged to reduce emissions from areas like refrigeration and transport.
Critics said the pledge did not extend to the supermarket's supply network, which accounts for most of its emissions. However, Sainsbury's said it would be contacting its suppliers.
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