Conversion to Biofuel of Food (Reduction of Food Supply)
3. Development of Developing Country (Increase in Demand of High Calorie Food)
4. Rise of Oil Price (Increase in Manure or Transportation Cost)
5. Financial Speculation (by Speculation Which Aimed at Price Boost Marginal Profits, Price is Further Rise)
6. Reduction in Area under Tillage (Reduction of Food Supply)
That is, the increase of supply does not catch up with the increase in food demand, but the balance of demand supply collapses, and a price soars. Furthermore, food production cost increases and it is pushing up the price further.
