Across
- 2. to get rid of something you do not want,
- 4. a substance that pollutes something, especially air and water
- 5. water that is found under the ground in soil, rocks, etc.
- 8. a chemical that is poisonous to plants, used to kill plants that are growing where they are not wanted
- 9. to make the meaning of something clearer by using examples, pictures, etc.
- 10. a substance that can make people or animal ill or kill them if they eat or drink it
- 11. a piece of soft material that you put into your ear to keep out noise or water
- 12. connected with heat
Down
- 1. growing or living in, on or near water
- 3. to make a substance or place dirty
- 6. a chemical used for killing pests, especially insects
- 7. lasting forever