Nature World: The realities of a large-scale food shortage have been spelled out in a new study from Fred Davies, senior science advisor for the US Agency for International Development's bureau of food security.
"For the first time in human history, food production will be limited on a global scale by the availability of land, water and energy," Davies said in a statement from Texas A&M University's AgriLife division, where he is a professor of horticultural science.
"Food issues could become as politically...