Food riots are erupting all over the world. To prevent them and to help people afford the most basic of goods, we need to understand the causes of skyrocketing food prices and correct the policies that have fueled them.

World food prices rose by 39 percent in the last year. Rice alone rose to a 19-year high in March -- an increase of 50 per cent in two weeks alone -- while the real price of wheat has hit a 28-year high.

As a result, food riots erupted in Egypt, Guinea, Haiti, Indonesia, Mauritania, Mexico, Senegal, Uzbekistan and Yemen. For the 3 billion people in the world who subsist on $2 a day or less, the leap in food prices is a killer. They spend a majority of their income on food, and when the price goes up, they can't afford to feed themselves or their families.

Analysts have pointed to some obvious causes, such as increased demand from China and India, whose economies are booming. Rising fuel and fertilizer costs, increased use of bio-fuels and climate change have all played a part.

But less obvious causes have also had a profound effect on food prices.

For the full article, please click here.