Last week’s Lancet report and its ‘planetary health diet’ of next to no red meat will have bolstered the egos of vegans who claim that they are doing the Earth a favour. But just how environmentally friendly are many of the alternatives favoured by vegans?
Fancy a bowl of quinoa, a grain stacked with amino acids, magnesium, phosphorous and iron, which in 2013 enjoyed the endorsement of the UN as a ‘superfood’? Not so fast.

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