Here is one that took me about 15 seconds to find.

From Slate

So what is causing the rise in food prices—and might prices abate, easing tensions in Egypt? Unfortunately, the answer is probably no. Commodity speculation by hedge funds and financial entities might be contributing to the global run-up in prices. But much of the recent increase can be explained by the simple laws of supply and demand. First, there are constraints on yields, caused by recent droughts in Russia, floods in Australia and Pakistan, and increased production of crops for ethanol and other biofuels, rather than food. At the same time, demand for food commodities has continued to climb in big and fast-growing countries like India and China. And rising oil prices—a key component of food costs, given the cost of shipping goods—aren't helping, either.

So why haven't Americans noticed an uptick in costs at the supermarket? Mostly because raw food costs are a smaller proportion of overall food costs for American consumers. When you buy a box of Wheaties, you're paying for packaging, advertising, and processing, as well as the wheat, making the price more insulated from inflation. In addition, U.S. food producers tend to trade in the futures markets to smooth costs—meaning ingredient costs get locked in months or even years in advance.

So, the global food crisis has remained mostly invisible in the United States. But it is all too visible in Egypt and other Northern African emerging economies. And the economic forces do not look like they will abate any time soon.