Food production will have to increase by 70% over the next 40 years to feed the world's growing population, the United Nations food agency predicts. The Food and Agricultural Organisation says if more land is not used for food production now, 370 million people could be facing fa

“In early 2008, Saudi Arabia announced that, after being self-sufficient in wheat for over 20 years, the non-replenishable aquifer it had been pumping for irrigation was largely depleted,” writes Lester R.