Across
- 5. Gas released from burning coal that causes acid rain
- 6. The layer of gases surrounding Earth
- 10. Planting more trees to reduce air pollution
- 12. Pollution caused by smoke from factories
- 13. Natural source of air pollution from erupting mountains
- 14. Heat trapped in Earth’s atmosphere due to gases
- 15. A thick, dirty fog formed by air pollution in cities
Down
- 1. The gas mainly responsible for global warming
- 2. The layer that protects Earth from harmful UV rays
- 3. Rain that becomes acidic due to air pollution
- 4. A poisonous gas produced by incomplete burning of fuel
- 7. Tiny particles in air that can harm our lungs
- 8. Harmful gases released by vehicles and factories
- 9. Index used to measure how clean or polluted the air is
- 11. Burning of fuels like petrol and diesel