Well, when the rate of increase of population outstrips rate of increase of food production, then there is a production paradox-- despite increase in food production in all regions, the number of hungry stomaches still increase! From NYT:
Scientists and development experts across the globe are racing to increase food production by 50 percent over the next two decades to feed the world’s growing population, yet many doubt their chances despite a broad consensus that enough land, water and expertise exist.The number of hungry people in the world rose to 1.02 billion this year, or nearly one in seven people, according to the United Nations Food and Agriculture Organization, despite a 12-year concentrated effort to cut the number.The global financial recession added at least 100 million people by depriving them of the means to buy enough food, but the numbers were inching up even before the crisis, the United Nations noted in a report last week.Agronomists and development experts who gathered in Rome last week generally agreed that the resources and technical knowledge were available to increase food production by 50 percent in 2030 and by 70 percent in 2050 — the amounts needed to feed a population expected to grow to 9.1 billion in 40 years.
Despite an increase in technology and food production techniques, why is there still increasing hunger? Are we approaching Malthusian nightmare? Here is Greg Clark:
Thomas Malthus warned in 1798 that population pressures would forever keep food and energy scarce and incomes low. In the 200 years since, world population has grown sevenfold, to 6.7 billion. Yet food and energy have become cheaper and more abundant. Malthus's dystopia, it seemed, belonged in history's junkyard. But, suddenly, rapid growth in China and India and the consequent scramble for increasingly scarce resources has revived the Malthusian specter. By 2050, 9 billion people in a world where all have U.S. consumption standards would need eight times as much oil and five times as much food than the planet current uses. Is the future a world of $10-a-gallon gas and $20 Big Macs?