The environment

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Across
  1. 1. a species of which there are no more alive
  2. 5. to make something poisonous as a result of adding waste or chemicals
  3. 6. all the plants growing in a particular place or area
  4. 7. to grow and develop well or quickly
  5. 8. the production and discharge of something, especially gas
  6. 11. all the living things in an environment and the complex relationship between each of them and that environment
  7. 12. the cutting down or burning of all the trees in an area
  8. 14. the gradual wearing-away of the soil by natural forces
Down
  1. 2. the protection of plants, animals and natural resources
  2. 3. the variety of animal and plant life found in a particular place
  3. 4. animals that live in the wild in natural conditions
  4. 9. a group of animals or plants that have similar characteristics and can reproduce together
  5. 10. involving methods that do not use up or destroy natural resources
  6. 13. the natural home or environment of an animal, plant or other organism