London Guardian 
May 31, 2011
The average price of staple foods will more than double in the next 20 years, leading to an unprecedented reversal in human development, Oxfam has warned.
The world’s poorest people, who spend up to 80% of their income of food, will be hit hardest according to the charity. It said the world is entering an era of permanent food crisis, which is likely to be accompanied by political unrest and will require radical reform of the international food system.
Research to be published on Wednesday forecasts international prices of staples such as maize could rise by as much as 180% by 2030, with half of that rise due to the impacts of climate change.
After decades of steady decline in the number of hungry people around the world, the numbers are rapidly increasing as demand outpaces food production. The average growth rate in agricultural yields has almost halved since 1990 and is set to decline to a fraction of 1% in the next decade.