A new study warns of future losses in world food production because of crop damage from changes in the weather.William Cline wrote the study from the Center for Global Development in Washington.

• 一项最新研究警告由于天气变化导致农作物减产将会影响未来世界食品生产量下跌，来自华盛顿全球发展中心的威廉姆克莱写了这份研究。