Earth's day

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Across
  1. 2. something with the ability to contaminate
  2. 5. CO₂
  3. 7. a type of energy that comes from fisson
  4. 8. the group name for a type of fuel that comes from decomposed organics
  5. 9. variety of all life forms on earth
  6. 10. a powerplant produces ___
Down
  1. 1. _____ energy replenishes naturally
  2. 3. synthetic polimers,petroleum products
  3. 4. the introduction of harmful materials/energy into the natural environmen
  4. 6. a thin layer of gas in the stratosphere in the