谢谢大家给的意见，重读了一遍～～

Economists across the world are expressing concern about rising food prices. The United Nations Food and Agriculture Organization recently released its Food Price Index. The list showed that a number of foods cost more than during the world food crisis of two thousand eight. The index is at its highest level since it began in nineteen ninety.
Demonstrations and deadly food riots have broken out this month, as they did in two thousand eight.
The FAO predicts that world market prices for rice, wheat, barley, sugar and meat will stay high or continue rising. One reason for this is the threat of shortages caused by bad weather. Current and recent weather disasters have harmed agriculture and affected prices in several parts of the world.