CBS: The world will need 50 percent more food by 2050 due to both an increasing population and a shift toward a more Westernized diet in developing countries. But as our need for food rises, our ability to produce that food may be lowered by climate and air quality changes, according a to a study just published in Nature Climate Change. Researchers from MIT and Colorado State University found that if everything else stays as it is today, by 2050 global warming may reduce world crop yields by about 10...