Across
- 3. nature's way of reusing a certain atom through a bunch of different processes
- 7. the weather in a particular region
- 11. global transition to better manufacturing processes
- 12. long-term shifts in temperature and weather
- 13. non-renewable energy sources
- 15. a energy produced by the sun
- 18. something you can use over and over
- 19. used for the stove
- 21. can trap a certain amount of heat
Down
- 1. a rock burned to create energy
- 2. the key factor between conversion and storage of carbon
- 4. how plants make food
- 5. breathing
- 6. maintains comfortable temperature
- 8. something you can't use over and over
- 9. a liquid put in cars
- 10. large group of trees being cut down
- 14. energy emitted from Earth's surface and atmosphere
- 16. a planet heating up
- 17. increased carbon emissions
- 20. the lower end of the ph scale