Some time after the Mousekewitz's have settled in America, they find that they are still havin

　　大地在污染和环境灾害的双重打击下，已经处在崩溃的边缘，为了生存，人们创造了一个与世隔绝的都市，叫做ECOBAN(这个名字由ecology和ban合并起来，意思是“毁灭生态”)，而这个都市完全靠大地