Across
- 4. to keep safe from injury
- 7. the act of cutting down or burning trees in a area
- 8. to treat things that have already been used so they can be used again
- 9. an area of land where large amounts of waste material are buried under the earth
Down
- 1. to watch and help an animal or the environment
- 2. to make less rubbish
- 3. a large number of water covering an area that is usually dry
- 5. to use something again
- 6. something making land, water or sky dirty