“Everyone wants to eat like an American on this globe,” said Daniel W. Basse of the AgResource Company, a Chicago consultancy. “But if they do, we’re going to need another two or three globes to grow it all.”
Notice how the price of food has gone up recently – it's all because the price of grain, worldwide has gone up. Third world countries are now able to afford better food (e.g. bread), which leads to increased demand. Supply hasn't compensated; world stockpiles of grain are at an all time low, and prices have doubled. Great if you're a farmer, sucks for the rest of us.
I have personally seen a loaf of bread at the local supermarket go from £0.70 to £0.90 to £1.20 over the past month and a half. That's nearly double for the same loaf of bread.