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What are non-biodegradable substances ?...

What are non-biodegradable substances ?

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There are the substances which can not be broken down by the activity of micro-organisms. These go on concentrating at each trophic level of food chain, e.g., DDT, heavy metals (mercury, cadmium etc.).
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PRADEEP-NATURAL RESOURCES : OUR ENVIRONMENT-SHORT ANSWER QUESTIONS
  1. What is rain water harvesting?

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  2. List main sources of water pollution.

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  3. What are non-biodegradable substances ?

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  4. Name two types of biogeochemical cycles.

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  5. Name two examples of green house gases which contribute maximum toward...

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  6. Give two examples of nitrifying bacteria.

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  7. Give two main sources of carbon.

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  8. Name two measures which prevent the soil erosion.

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  9. What do you mean by biological weathering? Give two examples.

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  10. Differentiate between humification and mineralization.

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  11. Why is lead compound added to petrol? What is its harm?

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  12. What do you mean by hygroscopic water and combined water in the soil ?...

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  13. What is biomagnification? Name two heavymetals which, when magnified r...

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  14. What is eutrophication ? What it its consequence ?

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  15. Name two fresh water sources which provide fresh water for human use.

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  16. (a) Name two acids that are usually present in rain water. (b) How t...

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  17. Name any two climatic events that take place in the atmosphere.

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  18. Name any two fossil fuels being used by man which cause air pollution.

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  19. How do the fossil fuels being used by man which cause air pollution : ...

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  20. What are the sources of SO(2).(NO(X)) and methane.

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