The warmer world is likely to be a hungry world. Heat can be devastating to crops and climate change will significantly reduce crop yields. In many places, it already is.
A recent newspaper headline, ripped from the front page of the San Francisco Chronicle’s business section, reads “World’s Wheat Crop Stressed.” According to the article, “Yields aren’t keeping up with a world growing hungrier. Crops are stunted in a world grown warmer. A devastating fungus, a wheat ‘rust,’ is spreading out of Africa, a grave threat to the food plant that cover’s more of the planet’s surface than any other.” The article continues, “In the face of leap-frogging prices, stagnating yields and shifting climate zones, wheat cannot be counted on to fill humankind’s stomach in the future as it has since at least 7000 B.C.” This article is right to call attention to the multitude of social and scientific factors that combine to create food insecurity.
 Charles J. Hanley, “World’s Wheat Crop Stressed,” San Francisco Chronicle, November 14, 2010, D1.