Across
- 1. Loss of water vapour from aerial plants.
- 4. Respiratory problems.
- 6. Used by hikers and mountaineers.
- 7. Product of photosynthesis.
- 9. Used by packaging chips.
- 10. Used by observatory balloons.
Down
- 2. Mixture of gasses.
- 3. Process by which plants make their food
- 5. Contamination of air.
- 8. Symbiotic bacteria.