	Soái Muội \| Chat Online
	20/04/2023 21:55:40
	Tiếng Anh - Lớp 9 \| Tiếng Anh \| Lớp 9

Answer the questions

[ Nhấp vào hình ảnh để phóng to, xoay ảnh ]

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