As well as provide them more efficient launch point for eventual missions to Mars.

以及提供更有效的发射点，最终实现火星飞行。

Recycling is not the answer to waste from an efficient point of view, because we are not able to get all the waste separated properly, and therefore treated in the background.

从效率的角度来看，回收并不是解决垃圾的办法，因为我们无法对所有的垃圾进行适当分类，因此无法在一定背景下解决垃圾问题。