Environmental protection

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Across
  1. 2. getting too many fish from the sea or ocean
  2. 9. (10,6) CO2 + other gasses get into atmosphere
  3. 11. too many people living on the Earth
  4. 13. (7,10,6) the system of getting rid of peple´s waste
  5. 14. branch of biology - relationships between living organisms
  6. 15. dirt, when something is not clean
Down
  1. 1. (13,10) trying to preserve as much from the Earth as possible
  2. 3. (6,7) the Earth is getting more and more hot
  3. 4. cutting down all trees in forest
  4. 5. (5,6) where you get the H2O
  5. 6. (5,4) place with less ozone in the atmosphere
  6. 7. opposite to waste; for example energy, water, etc.
  7. 8. (5,4) the agreement of countries to use as little energy as possible
  8. 10. taking old thing and creating something new out of it
  9. 12. using waste material to create new material