Over a third of crops are grown to feed livestock, and that's if you're not counting pasture as a crop, which it absolutely is - arguably our first solar powered factory floor. Even areas that were grazed in the past have had the relative proportion of native flora and fauna severely reduced to minimal levels through introduced grasses and overgrazing. To get a feel for land use against calorie production, you could have a browse through https://www.nationalgeographic.com/foodfeatures/feeding-9-billion/ for an overview.
86% of the global livestock feed intake in dry matter consists of feed materials that are not currently edible for humans
But it also makes an important contribution to food security through the provision of high-quality protein and a variety of micronutrients – e.g. vitamin A, vitamin B-12, riboflavin, calcium, iron and zinc – that can be locally difficult to obtain in adequate quantities from plant-source foods alone
We already make enough food to feed the planet multiple times over, the issue isn't how much we've got, it's how to get it to people. Distribution is the issue.
But no, 1/3rd is not grown for livestock, this isn't true at all.
Over a third of crops are grown to feed livestock, and that's if you're not counting pasture as a crop, which it absolutely is - arguably our first solar powered factory floor. Even areas that were grazed in the past have had the relative proportion of native flora and fauna severely reduced to minimal levels through introduced grasses and overgrazing. To get a feel for land use against calorie production, you could have a browse through https://www.nationalgeographic.com/foodfeatures/feeding-9-billion/ for an overview.
https://www.sciencedirect.com/science/article/abs/pii/S2211912416300013
We already make enough food to feed the planet multiple times over, the issue isn't how much we've got, it's how to get it to people. Distribution is the issue.
But no, 1/3rd is not grown for livestock, this isn't true at all.
See page 12 of https://www.fao.org/3/a0701e/a0701e01.pdf in terms of feedstock percentages at that time (total production has doubled since then https://www.linkedin.com/pulse/animal-feed-industry-grow-up-due-rising-consumption-aqua-waghmare )
It's a bit of a roundabout way to get your micronutrients https://www.grandviewresearch.com/industry-analysis/animal-feed-additives-market unless you're conflating subsistence farming with the bulk of production and consumption.