Place your seat backs and tray tables in the full upright and locked position:
Global warming rage lets global hunger grow
Rice, death and the dollar
Notice this is about prices, not shortages. This is inflation, not scarcity.
Another factor here is that the real estate bubble is collapsing, and money is now flowing to commodities, raising their prices. Same thing happened when the dot-com bubble collapsed and all the money flowed into real estate. Only food commodities are more critical, and countries are clamping down on exports to ensure food security.