Environment

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Across
  1. 4. the process by which land changes into desert
  2. 6. a large amount of water covering an area that is usually dry
  3. 8. strong, unpleasant and dangerous gas or smoke
  4. 9. a layer of pil that is floating over a large area of the surface of the sea, usually because an accident has caused it to scape from a ship or container
  5. 10. the cutting down of trees in a large area, the destruction of forests by people
Down
  1. 1. rain which contains large amount of harmful chemicals
  2. 2. the number and variety of plant and animal species that exist in a particular environmental area
  3. 3. items intended to be thrown away after use
  4. 5. a sudden violent movement of the Earth's surface, sometimes causing great damage
  5. 7. a long period when there is little or no rain