Replace animal farms with micro-organism tanks, say campaigners

Advocates of plant-based protein say 75% of world's farmland should be rewilded to reduce emissions

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Enough protein to feed the entire world could be produced on an area of land smaller than London if we replace animal farming with factories producing micro-organisms, a campaign has said.

The Reboot Food manifesto argues that three-quarters of the world's farmland should be rewilded instead.