A source leaked a draft report drawn up by the United Nation's Intergovernmental Panel on Climate Change due to be released next March. The draft report, which is the second of three reports, outlines the threats that climate change poses to the global food supply. It cites a decrease of up to 2% each decade in yields of staple crops like maize, wheat, and rice. What's different about this report is the urgency with which the changes will take place. Rather than longer-term projections, changes are expected to occur rapidly over the next 20 to 30 years. The IPCC report will be officially released next year.