Where Data Tells the Story
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Global livestock numbers — tracked by the UN Food and Agriculture Organization since 1961 — have surged, with particularly large increases in the number of chickens, pigs, sheep, goats, and cows.
For many land animals, life is short and painful. Recent estimates indicate that globally, most animals are raised on factory farms. In the US, where better data and research are available, 99% of livestock is factory-farmed.