Simply cutting out beef and lamb (but still keeping dairy cows) would nearly halve our need for global farmland. We’d save 2 billion hectares, which is an area twice the size of the United States. That is, by far, where the biggest saving comes from. And it doesn’t mean that we all need to go vegan. If we were to cut out dairy too, we’d halve this land use again to just over 1 billion hectares. Three USA-sized farms saved. But from there, the reductions are marginal. Sure, the vegan diet does minimise it the most: if everyone ate a vegan diet we’d reduce the amount of land we use for farming
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