摘要：Global food production, so far, has increased continuously because cropped area has expandedand productivity per unit area has increased. In some regions of the world, however, there is littlescope for further spatial expansion of agriculture. In other areas, crop yields are stagnating. Doesthis imply that the world is approaching the biophysical limits of food production.While there is an upper limit to food production, results of recent analysis indicate that globalagriculture is still far from it. Because decreasing growth in global food production has beenobserved, policymakers should not be misled into thinking that the world is approaching that limit.
