Polar Bears

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Across
  1. 3. A country where polar bears live (6 letters).
  2. 5. Another problem polar bears face with humans (8 letters).
  3. 6. What is melting because of high temperatures? (3 letters).
  4. 7. Polar bears eat these marine animals (5 letters).
Down
  1. 1. A big animal that polar bears sometimes eat (5 letters).
  2. 2. The reason the ice is melting (7 letters).
  3. 4. The cold region where polar bears live (6 letters).
  4. 5. The main threat to polar bears' survival (7 letters).