People and the planet

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Across
  1. 1. Release into the air (noun)
  2. 3. Variety of plant and animal species in an environment.
  3. 5. The nations of the world which are considered more economically and technologically advanced; industrialized nations
  4. 8. At risk to die out.
  5. 9. Causing little or no damage to the environment and therefore able to continue for a long time.
  6. 13. A mixture of gases, such as nitrogen, oxygen, and carbon dioxide, that surrounds the Earth.
  7. 14. Different kinds of living creatures.
  8. 16. The place in the environment where a plant or animal lives.
Down
  1. 1. To be good for the environment.
  2. 2. A natural or human-made gas that traps heat in the atmosphere.
  3. 4. Another word for to lower or lessen.
  4. 6. A natural community of plants, animals, and other organisms and the physical environment in which they live and interact.
  5. 7. of To throw away
  6. 10. Another for dying out
  7. 11. Another word for "contaminate".
  8. 12. The ability to be made or regrown as fast as it is being used.
  9. 15. Loss or harm resulting from injury to person, property, or destruction.