National Geographic’s September Issue – Where Food Begins: Our Good Earth
By Charles C. Mann
By 2030, when today’s toddlers have toddlers of their own, 8.3 billion people will walk the Earth; to feed them, the UN Food and Agriculture Organization estimates, farmers will have to grow almost 30 percent more grain than they do now.
“With eight billion people, we’re going to have to start getting interested in soil,” he said. “We’re simply not going to be able to keep treating it like dirt.”