The next graph demonstrates that this increased production is being achieved using relatively less energy. In other words, efficiency gains have been achieved through a variety of methods over the years.
Are we at a turning point? Are there more efficiencies to be gained? Or will farmers be returning to organic farming methods which use less expensive inputs out of economic necessity (rather than ethical choice) at some point in the future? Which farming systems would be the most logical choices for continuing energy intensive methods and which systems would be most adaptive for organic methods? Can we intelligently combine the best of both worlds? How will policy-makers respond?