Endangered Species

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Across
  1. 4. seriously at risk of extinction.
  2. 5. continue to live or exist, especially in spite of danger or hardship.
  3. 7. a person born in a specified place or associated with a place by birth, whether subsequently resident there or not.
  4. 8. keep safe from harm or injury.
Down
  1. 1. a disorder of structure or function in a human, or animal.
  2. 2. contaminate (water, the air, etc.) with harmful or poisonous substances.
  3. 3. relating to chemistry, or the interactions of substances as studied in chemistry.
  4. 6. end the existence of (something) by damaging or attacking it.