Environment

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