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Since when the level of ozone has starte...

Since when the level of ozone has started decreasing in atmosphere?

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MBD -HARYANA BOARD-OUR ENVIRONMENT-EXAMPLES
  1. What harm can be caused to human beings by U.V.radiations?

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  2. What decomposes atoms of oxygen (O2)to free oxygen (o) at the higher l...

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  3. Since when the level of ozone has started decreasing in atmosphere?

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  4. What is the root cause of depletion of ozone layer?

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  5. Where are CFC's mainly used?

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  6. What agreKHOent was accepted by united nations environment programme (...

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  7. How improvKHOent in our life style has affect grabage?

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  8. Which type of garbage has increased with the change in packaging mater...

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  9. Name any two water pollutants.

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  10. The word 'ecosystem' was coined by

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  11. Green plants are:

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  12. Which organism is a decomposer?

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  13. Grass-insect-frog-snake-hawk. In this food chain the secondary consume...

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  14. Which one is a primary consumer in a pond ecosystKHO?

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  15. Best arrangement of an energy system consists of hawks, snakes, mice a...

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  16. They can be put in the category of promary consumers:

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  17. ……and…..are examples of non-biodegradables waster.

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  18. …..and….are exapmples of artificial ecosystKHO.

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  19. Plants prepare their own food by trapping solar energy and are called…...

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  20. ………….is a unit of environment and can be identified and studied.

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