Environment

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Across
  1. 5. The act of cutting down or burning trees in an area
  2. 6. Introduction of harmful materials into the environment
  3. 8. A large number of water covering an area that is usually dry
  4. 9. To watch and help an animal or the environment
Down
  1. 1. To use something again
  2. 2. Ozone layer lies in which layer of the atmosphere
  3. 3. area of land where large amount of waste materials are burried under the earth
  4. 4. To keep safe from injury, harm or destruction
  5. 7. To make less rubbish