The environment

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Across
  1. 1. it's in the air
  2. 3. we throw this away every time we buy something new
  3. 4. this is happening to parts of the coast
  4. 5. this is melting
  5. 7. an alternative type of commerce
  6. 8. capable of decaying through the action of living organisms
  7. 10. the consequence of cutting down lots of trees
  8. 16. the conversion of sunlight into electricity
  9. 19. there is a hole in it
  10. 20. it is getting warmer and warmer
Down
  1. 2. a small percentage of agriculture produces this
  2. 6. a colourless, odourless, incombustible gas
  3. 9. cities become this when there is too much pollution
  4. 11. coal, oil, gas
  5. 12. domestic or industrial waste which is carried into sewers
  6. 13. this is sprayed on to crops
  7. 14. which can be restored so it can be used again
  8. 15. cars, trucks and factories give these off
  9. 17. we all produce too much of it
  10. 18. genetically modified organism