It's unclear whether Big Agriculture, or small local farms, can save humanity from itself. Yet both groups sit on the sidelines yelling at each other without clear long-term strategies, suggesting that humanity is doomed unless the deniers are right.
The green revolution helped feed the world with new varieties of food crops and fertilizers. Now, genetic engineering is extending that progress. In a recent "proof of concept" study, researchers improved the efficiency of carbon dioxide utilization by plants — which could well result in marked increases in food production without additional land going under the plow.