It is related to the garbages and fertilizers.

污染为外源性污染，与垃圾肥料的使用有关。

What? Spacecrafts don't leave that much garbages.

什么？宇宙飞船应该不会剩下那么多垃圾吧？

Garbages are required to be sorted for disposal or recycling.

垃圾需要分类进行处理或回收。

He eats out of garbages and smokes cigarettes he finds on the ground.

他吃垃圾堆里捡来的食物,吸地上找到的烟头.