How green are dairy cows? Are they a sustainable source of food or a threat to the survival of the planet?
In recent months there has been much debate about livestock emissions of global warming gases, especially methane, with the Food and Agriculture Organisation of the UN asserting that livestock are worse polluters globally than transport.
Now some detail and numbers are being added to the debate with the publication of a study by Kite Consulting and paid for by ASDA, ARLA and Dairy Crest on the carbon emissions of on-farm milk production.
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