UN warns on food shortage riots.rising food prices could cause worldwide turmoil and global political instability. "A top United Nations official has warned that rising food prices could cause worldwide turmoil and global political instability.Food price rises of more than 40 per cent in the last 12 months have helped spark riots and unrest in countries like Egypt, Haiti and Uzbekistan.On Monday there were food riots in Haiti and there have been violent protests in Ivory Coast. Riots after price rises in Cameroon in February left 40 people dead." --go go bio fuels?April 09 2008 - US0YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.