Exercise 2. Choose the correct word to complete each sentence. 1. Cars burn petrol and produce toxic clouds / fumes / smoke. 2. We need to reduce / damage / clean the amount of plastic we use. 3. Factories sometimes dump their waste / soil / air into rivers. 4. Acid / Solar / Dirty rain can kill trees and fish. 5. Many fish species / stations / places are dying because of water pollution. 6. A power / factory / water station that uses coal creates a lot of smoke. 7. We can use acid / solar / wind power to heat our homes. 8. The soil / waste / paper in this area is poisoned and nothing grows here. 9. Air pollution / reduction/solution is a big problem in many cities. 10. The chemical spill damaged/reduced/helped the whole forest.