"Malthusian predictions that relentless population growth will outstrip food production and trigger starvation worldwide have recurred over the centuries. They have come and then gone as farmers have deployed new technologies to increase food output. Even now, enough food is being produced to adequately feed every person on the planet; the fact that nearly one billion people are nonetheless going hungry is a damning indictment of the world's food-distribution system. But since demand is growing, production will also have to increase in the years ahead. With the world's population expected to expand to more than nine billion by 2050 and much of that growth occurring in China, India, and other countries where living standards are rising fast, global food production will need to increase by 70-100 percent in order to keep pace and feed the already chronically hungry. This is a mighty challenge: all the more so because given current soil technology and environmental concerns, more food will have to be produced on roughly the same amount of arable land -- and with less water than is used now and at a time when both growing demand for biofuels and changing climate patterns are also putting pressure on production. Where will the needed rise in food supplies come from, and how quickly can the distribution problems be solved?"