Global warming may affect nutritional value of crops

BBC : Rising levels of atmospheric carbon dioxide can diminish the nutrient value of certain crops such as grains and legumes, according to a paper published in Nature. Because people all over the world depend on such dietary sources for essential nutrients like zinc and iron, the new finding adds to a growing list of potential health problems that may arise because of climate change. Although researchers don’t yet understand the mechanism by which CO₂ limits crop nutrition, they have found that sensitivity to CO₂ differs among grain species. They suggest that cultivating crops that are less sensitive to CO₂ may be one way to bolster global food production, which is already being threatened by rising temperatures.