Factory farming is a major risk for investors. There are four inconvenient truths about factory farming—what I call the four horsemen of the apocalypse: human health, climate change, food security, and planetary resources. Factory-farmed meat is the number one user of freshwater, antibiotics, deforestation, and it just isn’t an efficient way to feed people. Farm animals are outpacing humans in demand for cereals now—we need to stop this madness.

