U3 L1

12345678910111213
Across
  1. 2. to value
  2. 5. Smog
  3. 8. to fly
  4. 10. Garbage Container
  5. 11. to protect
  6. 13. Clean Air
Down
  1. 1. ground, soil
  2. 3. Biodiversity
  3. 4. to diminish
  4. 6. to improve
  5. 7. to support
  6. 9. to destroy
  7. 12. the invention