Why curbing methane emissions is tricky in fight against climate change

Marks and Spencer is to invest £1 million on a diet plan for dairy cows in the latest bid by big business to curb methane emissions.

The retailer is aiming to “slash” up to 11,000 tons of greenhouse gas emissions annually by making the burps and farts of its 40 herds of pasture-grazed milk cows “more eco-friendly”, said the Daily Mail. M&S claims that switching them to a diet derived from mineral salts and a by-product of fermented corn will reduce methane production during digestion, cutting the carbon footprint of the cows’ milk by 8.4%.

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