African drought? “Water isn’t the fundamental problem. It’s poor soil,” he says. “The absence of nutrients can be offset by cultivating plants that act in symbiosis with certain bacteria to produce their own fertilizer.” The soaring cost of grain to feed animals? “Feed them grasshoppers instead,” he says. One hectare of land yields one metric ton of soy protein, a common livestock feed, a year. The same amount of land can produce 150 tons of insect protein.