Two potential global environmental problems may pose threats to the health and well being of humans. Abnormally high incidences of ultraviolet radiation on the earth surface due to depletion of stratospheric ozone and climate change due to artificial introduction of green house gases are the basic problems. Those are interrelated both are caused by human produced gases released into atmosphere. They differ however, in that there is a general scientific and political consensus concerning the deterioration of ozone layer, whereas potential global warming remains subject to controversy. Stratospheric ozone absorbs U.V. radiation and shields the earth surface from large amount of U.V. radiations reaching the earth surface. Increased UV radiation exposure can result in increases in skin cancer and cataracts among humans, the inhibition of photosynthetic processes in certain plants, the disruption of insect activity and decreases in productivity of ocean ecosystem. Disruptions of the ozone layer would also cause the stratosphere to cool potentially affecting climate patterns on Earth. Many trace atmospheric gases such as carbon-dioxide, methane, water vapour and manmade CFCs are relatively-transparent to sunlight but opaque to infrared radiation. This results in the heating of the earth's surface and lower atmosphere the greenhouse effect. Without a natural greenhouse effect the surface of earth would be a frozen mass, but too much greenhouse effect could also cause abnormal global warming.

1. What are CFCs What are their uses

2. How do CFCs damage the ozone layer

3. What are the impacts of ozone depletion

4. What are greenhouse gases

5. What are the sources of greenhouse gases

6. What is Median Mass

7. Differentiate between superimposed drainage and antecedent drainage.

8. Name the structural divisions of the atmosphere indicating elevation-ranges based on temperature.

9. Describe the conditions required for development of tropical cyclones.

10. What is Mid Ocean Ridge

11. What are the functions of ecosystem

12. What are the uses of digital mapping

13. Differentiate between Isopleth and Choropleth methods.

14. Explain the concept of 'Population-Resource Region'.

15. What do you understand by an Urban Region

16. Define Hexagonal Market Area.

17. Comment on National Highways of India.

18. What is meant by a 'Cultural-Region'

19. Differentiate between a Planning Region and a Formal Region.

20. Explain 'Demographic-Divide'.

21. Describe the causes of origin of Ocean currents.

22. Describe application of Remote Sensing in Geographical Study.

23. Distinguish between renewable and non-renewable resources and suggest measures to conserve them.

24. Discuss the concept of 'Special Economic Zone' in relation to regional development in India.

25. Discuss the contributions of Brian B.J.L. Berry to the Quantitative Revolution in Geography.

26. Discuss the fundamental concepts of Geomorphology.

27. Discuss the factors responsible for regional disparities in India.

28. Discuss various factors responsible for location of industries and elaborate the salient features of Weber's Theory.