What sort of natural resources will be saved if we...

A

- Hướng dẫn giải

Phương pháp giải:

Giải chi tiết:

A lot of natuaral resources such as coal and oil will be saved if we do not waste energy. – câu thứ 6, dòng cuối cùng. (By not wasting energy, we will save a lot of natural resources such as coal and oil.)