It is estimated that one in nine people are chronically undernourished. That’s more than 800 million people worldwide, and the world population is predicted to rise from 7 billion to as much as 11 billion by 2050. Why is this? Currently 36% of calories from the world’s crops are being used to feed meat animals, yet only 12% of those calories end up feeding humans in the form of meat and animal products. Were we to grow crops just to feed humans directly, we could increase available food calories by up to 70% – enough to feed another 4 billion people.