Across
- 2. calculated by averaging the temperature
- 4. effect by absorbing radiation
- 6. derived directly from living matter
- 10. planets lower atmosphere
- 11. growing crops
- 12. weather conditions
Down
- 1. flammable
- 3. natural gas
- 5. mass or river of ice
- 7. layer of ice
- 8. state of atmosphere
- 9. reduction in ph