Geothermal energy is being used in isolated places. To get more geothermal energy, he said, we’d need to drill deeper into Earth. Read more about it here.
"We want a kind of agriculture that's productive," he said, "but we can't afford to damage the environmental resources that agriculture largely relies upon."
Lynch said the second Green Revolution can’t depend on irrigation or fertilizer. He said that to grow more food under tough conditions affordably, we’re going to have to breed plants with improved roots.