Complete each sentence with an appropriate word. The first letter of each word is given.
1. The fish have died because the river water is heavily polluted.
2. Health effects from air pollution include lung cancer and respiratory diseases.
3. Acid rain causes serious damage to plants and trees.
4. If the air wasn’t dirty, Nick wouldn't sneeze so much.
5. The main gases that lead to acid rain are sulfur dioxide and nitrogen dioxide.
6. There is a danger of serious contamination from radioactive waste.
7. Hundreds of dead fish were found floating in the river near the factory.
8. Using sewage can spread disease and contaminate drinking water sources.