Crossword challenge

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Across
  1. 6. Living things such as fish plants and animals
  2. 7. The process of using things again
  3. 8. Waste that harms ocean and land
  4. 9. Large body of salt water covering most of Earth.
  5. 10. Natural home of an organism
Down
  1. 1. Keeping nature safe and healthy
  2. 2. Tiny plants in the ocean that produce oxygen
  3. 3. Using resources wisely to protect the future
  4. 4. The Earth's air, water,and land together
  5. 5. Animals and plants living in nature