What are the various constituents of domestic sewage? Discuss the effects of sewage discharge on a river.

List all the wastes that you generate at home, school or during your trips to other places. Could you very easily reduce the generation of these wastes? What would be difficult or rather impossible to reduce?

Discuss the causes and effects of global warming. What measures need to be taken to control global warming?

Match the items given in column A and B.

                  Column A                                        Column B

1. Catalytic converter                     (i) Particulate matter
2. Electrostatic precipitator          (ii) Carbon monoxide and nitrogen oxides
3. Earmuffs                                      (iii) High noise level
4. Landfills                                       (iv) Solid wastes

Write critical note on the following:

1. Eutrophication
2. Biological magnification
3. Ground water depletion and ways for its replenishment

Why does ozone hole form over Antarctica? How will enhanced ultraviolet radiation affect us?

Discuss the role of women and communities in protection and conservation of forests.

What measures, as an individual, would you take to reduce environmental pollution?

Discuss briefly the following:

1. Radioactive wastes
2. Defunct ships and e-wastes
3. Municipal solid wastes

What initiatives were taken for reducing vehicular air pollution in Delhi? Has air quality improved in Delhi?

Discuss briefly the following:

1. Greenhouse gases
2. Catalytic converter
3. Ultraviolet B