Nối vế câu: 1. Overfertilization contributes to soil pollution, 2. Because there is so much light pollution from the water 3. Lake, river, ocean and ground water get contaminated 4. Carbon monoxide is a poisonous gas 5. The soil is exposed and vulnerable to erosion 6. The polluted fog became so thick 7. Since air pollution is a threat to human health, 8. People living near the airport aren’t getting enough sleep a. because of aircraft noise. b. due to discharge of pollutants in the ground, bodies. c. everybody should try their best to reduce it. d. as a result of the removal of vegetation. e. so you only need to apply fertilizer once or twice per year. f. people cannot see the stars in the night sky. g. that people could only see a few meters in front of them . h. that can lead to health problems 1. 2. 3. 4. 5. 6. 7. 8.