Hanging by a thread

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Across
  1. 4. farm animal
  2. 5. a large open area of land covered with grass,used for grazing
  3. 7. the destruction of habitats, usually due to human activities
Down
  1. 1. when habitable land turns into desert
  2. 2. destruction of vegetation caused by too many grazing animals
  3. 3. illegal hunting of protected animals
  4. 6. change a change in global or regional climate patterns