...of cows, pigs and chickens that we slaughter and eat.

If people were willing to eat primarily vegetarian, we'd be perfectly able to feed everyone with regular crops. The article even said as much...China's inability to feed its population stems from their love of meat.

We do not have a food supply problem. We have never had a food supply problem. We have distribution problems, and allowing a handful of US companies to expand that distribution problem is the stupidest thing humanity could do.