saving the planet

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Across
  1. 4. reuse waste
  2. 7. food for whale
  3. 8. where you throw away trash
  4. 9. science of the environment
  5. 10. people who act for a cause
Down
  1. 1. a synonym of floating
  2. 2. sea
  3. 3. temperature of the planet
  4. 5. space around us
  5. 6. something the activist fight for