Across
- 3. gas released during photosynthesis
- 5. the green pigment in leaves that captures sunlight
- 7. is produced from the combustion of fossil fuels
- 8. long-term changes in weather patterns
- 9. released by rotting vegetation and livestock
Down
- 1. the layer that surrounds the Earth
- 2. logging activities that reduce CO2 absorption
- 4. sugar compounds produced through photosynthesis
- 6. fuels such as coal and oil
- 8. chemical symbol for hydrocarbons