Across
- 2. What constitutes 21% of the Earth's atmosphere?
- 4. What is visible indication of air pollution?
- 6. Which gas inhalation is dangerous.
- 7. The air that covers the whole of the Earth like a blanket.
- 9. What occupies very large part of Earth's surface?
- 10. The combustion of which fuels increases the amount of suspended particles in air.
Down
- 1. In large parts of India, rains are mostly brought by the southwest or north-east ................
- 3. An increase in the content of harmful substances in air.
- 5. What is formed due to the heating of water bodies and the activities of living organisms.
- 8. What is the name for outer layer of Earth?