Across
- 3. The largest reservoir of water on earth
- 4. Layer of air surrounding the earth
- 6. A phenomenon caused by excess CO2 in the environment raising earths temperature.
- 8. The ways by which water from clouds come down to earth
- 9. The gas present in largest quantity in atmospere
- 10. A mixture of smoke with fog
- 11. This type of natural resource replenishes itself naturally and does not get used up.
Down
- 1. The pollution of lakes and ponds because of algal bloom caused by excessive fertilizers.
- 2. a tri-atomic form of oxygen
- 5. A source of fresh water that starts in the mountains and finishes in the ocean.
- 7. frozen rivers of water found in mountains and polar region