UK Government Study Finds: If Nothing Is Done, Expect Civilizations' Collapse By 2040

"We ran the model forward to the year 2040, along a business-as-usual trajectory based on 'do-nothing' trends - that is, without any feedback loops that would change the underlying trend. The results show that based on plausible climate trends, and a total failure to change course, the global food supply system would face catastrophic losses, and an unprecedented epidemic of food riots.