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	20/04/2023 21:55:40
	Tiếng Anh - Lớp 9 \| Tiếng Anh \| Lớp 9

Answer the questions

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b. Answer the questions:
1. What is the passage about?
2. Why is the pollution problem complicated?
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3. Do factories discharge a lot of the material that pollutes the water?
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4. What would people have to do if they want to reduce pollution?