Greenhouse gases

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