Ana Molina - Angela Pulido

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Across
  1. 1. action that reuses waste to care for the environment
  2. 3. defend someone
  3. 5. repetitive action in the week
  4. 8. incorporation of oxygen
  5. 10. 70% of the world
  6. 12. element we use to keep warm
  7. 13. difficult understanding
  8. 14. everything that surrounds us
  9. 15. degree of cold and heat of bodies
Down
  1. 2. species transformation process
  2. 4. Its evolution is important for the world
  3. 6. layer that covers the earth
  4. 7. garbage in nature
  5. 9. set of past experiences
  6. 11. biological system made up of living beings