Across
- 3. most common greenhouse gas
- 7. trapping of thermal energy
- 8. rays of sunlight that shine down on the Earth every day
- 9. gas we produce when we breathe and when we burn wood and fossil fuels
- 12. responsible for most of the carbon dioxide emissions in the US in 2013
- 13. phenomenon of average temperature of the Earth beginning to rise
- 14. more of these predicted due to rise in temperature
Down
- 1. main gas in natural gas; produced when once-living matter decays and animal waste
- 2. blanket of gases surrounding the earth
- 4. large methane source
- 5. water vapor, carbon dioxide, methane, f-gases, ozone, nitrous oxide
- 6. National Aeronautics and Space Administration
- 10. what could happen to the ice at the North and South Poles
- 11. responsible for 5.3% of the US Greenhouse gas emissions in 2013