Across
- 3. compound causing depletion of ozone in the stratosphere
- 6. plants having the nitrogen fixing bacteria in the root nodules
- 8. life supporting zone of earth
- 9. process by which oxygen returns to atmosphere
- 10. thing through which table salt is made
Down
- 1. microorganism which helps in formation of soil
- 2. organism which helps in the bringing back the minerals from the living system to the nutrient pool
- 4. major component due to which life is not possible on mars
- 5. a way of prevention of soil erosion
- 7. after rhe growth of lichens growth of this happens on barren rocks