`21.` Yes, they can.

`-` Dẫn chứng: Most types of paper can be recycled. Newspapers have been recycled profitably for decades and recycling of other paper is growing.

`22.` Because it helps consumers know what they are buying in a paper product.

`-` Dẫn chứng: It’s important to know what you are buying in a paper product, for that reason virtually all paper products should be marked with the percentage and tupe of recycled content.

`23.` No, they aren’t.

`-` Dẫn chứng: "Recycled paper" can mean anything from `100`% true recycled paper to `1`% re- manufactured ends of large paper rolls.

`=>` Tạm dịch: "Giấy tái chế" có thể có nghĩa là bất cứ thứ gì từ `100`% giấy tái chế thực sự đến `1`% phần cuối được sản xuất lại của cuộn giấy lớn.

`24.` "Post`-`consumer" means the paper that you and I return to recycling centers.

`-` Dẫn chứng: "Post- consumer" means the paper that you and I return to recycling centers.