They will also need a large amount of air so that people the

这是so that引导的目的状语从句。主句：They will also need a large amount of air 主语：they谓语：will need宾语：a large amount of air （目的）状语从句：so that people there can breathe 主语：people谓语：can breathe本题很容易错误地解答为结果状语从句。其实判别方法很简单,一般来讲so that连在一起,就是目的状语从句,如楼主的这句；so和that分开就是结果状语从句,如：Tom got up so late that he could catch the early bus this morning。请楼主注意区分。