III. 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 p________. 2. Health e________ from air pollution include lung cancer, and respiratory diseases. 3. Acid rain causes serious d________ to plants and trees. 4. If the air wasn’t dirty, Nick w________ sneeze so much. 5. The main gases that l________ to acid rain are sulfur dioxide and nitrogen dioxide. 6. There is a danger of serious contamination from radioactive w________. 7. Hundreds of d________ fish were found floating in the river near the factory. 8. U________ sewage can spread disease and contaminate drinking water sources.giải thích giúp mình với nhé mình cảm ơn