The environment

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Across
  1. 1. away when water destroys something
  2. 5. to move to another place
  3. 7. poisoning and making something bad
  4. 8. to protect something for the future
Down
  1. 2. to affect a larger area or a bigger group of people
  2. 3. destroying somtehing
  3. 4. to leave a place because of danger
  4. 6. to stay alive, despite difficult conditions