Nature details the agricultural challenges ahead. On the latest crisis:
The world currently has more than enough food, but some 1 billion people still go hungry because they cannot afford to pay for it. The 2008 food crisis, which pushed around 100 million people into hunger, was not so much a result of a food shortage as of a market volatility — with causes going far beyond supply and demand — that sent prices through the roof and sparked riots in several countries. Economics can hit food supply in other ways. The countries in the Organisation for Economic Co-operation and Development pay subsidies to their farmers that total some US$1 billion a day. This makes it very difficult for farmers in developing nations to gain a foothold in world markets.
The Dish 