What Can Be Done to Ease the Global Food Crisis?

Americans have been getting a taste of the global food crisis at the check-out counter in recent days, as chain stores including Costco and Sam's club have put a limit on the sale of specialty rice. The United Nations has called the current crisis a "perfect storm" of rising demand from developing countries, the impact of climate change, and policy responses by governments. What policy changes does the west need to make to end the crisis? How has the use of farm land for ethanol production affected global food supplies? How are Wall Street investors helping to keep commodities prices high? What are the long-term solutions for feeding the hungry?