Đáp án `+` Giải thích các bước giải:

`2.` No, they don't.

`-` Dẫn chứng: Dòng `4,5` (These [plastic bags] stay in the environment, they are not like paper or wood that slowly disappear.)

`3.` Chemical wastes come from factories.

`-` Dẫn chứng: Dòng `6,7` (Factories that make or use chemicals always have chemical wastes.)

`4.` The nuclear fall-out causes cancer and kill animals and people.

`-` Dẫn chứng: Dòng `9,10` (The fall-out causes cancer and kill animals and people.)

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