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