Across
- 3. carbon... is a toxic, odourless, colourless gas
- 5. particulates can cause global
- 7. ...wavelength radiation is absorbed by co2 and methane
- 8. life first evolved in the...
- 9. gas formed in photosynthesis
- 10. reaction that takes place in chloroplasts
- 12. climate change can lead to a loss of...
- 14. early life forms that do photosynthesis
- 15. carbon... is the amount of carbon a process adds to the air
- 17. crop that releases large amounts of methane when grown
- 19. sulphur dioxide can lead to...
- 21. carbon dioxide + water becomes oxygen +
- 22. ...converters in cars reduce its air pollution
- 23. nitrogen-containing gas in early atmosphere
Down
- 1. in hot car engines, oxygen can react with...
- 2. ...rocks act as carbon sinks when forming
- 4. ...combustion can lead to carbon monoxide or soot
- 6. the increased... effect is leading to climate change
- 9. gas that protects against UV rays
- 11. wavelength radiation passes through the air onto the surface
- 13. water vapour... as the early atmosphere cooled
- 16. fuels that add as much co2 to the air as they took in
- 18. source of early atmosphere
- 20. greenhouse gas released by cattle