Water shortages can ruin crops, increase the incidence of water-borne and water-related diseases, and damage aquatic ecosystems ( the shrinking of Lake Chad being a prime example). 缺水可能毁坏农作物,增加水传播和水相关疾病的发病率,并且破坏水生生态系统(乍得湖的缩小是一个著名的例子)。
This is Lake chad, once one of the largest lakes in the world. 查德湖,曾经是世界上最大的湖。