Across
- 4. - Most of the earth is filled with
- 5. - Month in which Earth day is celebrated
- 6. - Process of converting sunlight to food for plants
- 9. - Body part which used to smell
Down
- 1. - Layer which is closer to earth
- 2. - What gives oxygen to breath
- 3. - Vehicles cause this pollution, not air pollution
- 7. - What is the gas which we breath in?
- 8. - Most abundant gas in atmosphere