Rachel Carson's famous book 'Silent Spring' is related to:

1. pesticide pollution
2. noise pollution
3. population explosion
4. ecosystem management

Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to the depletion of the stratospheric zone?

The zone of atmosphere in which the ozone layer is present is called:

1. Ionosphere

2. Mesosphere

3. Stratosphere

4. Troposphere

Kyoto-Protocol was endorsed at:

1. CoP-3

2. CoP-5

3. CoP-6

4. CoP-4

A scrubber in the exhaust of a chemical industrial plant removes:

1. Gases like sulphur dioxide

2. Particulate matter of the size 5 micrometer or above

3. Gases like ozone and methane

4. Particulate matter of the size 2.5 micrometer or less

Global warming can be controlled by:

In an area where DDT had been used extensively, the population of birds declined significantly because:
1. Birds stopped laying eggs
2. Earthworms in the area got eradicated
3. Cobras were feeding exclusively on birds
4. Many of the birds laid eggs, but the eggs did not hatch

Which one of the following is a wrong statement?

Which one of the following pairs of gases are the cause of 'Greenhouse effect'?

1. ${\mathrm{CO}}_2$ $\mathrm{and}$ $\mathrm{CO}$

2. ${\mathrm{CFC}}_{\mathrm{s}}$ $\mathrm{and}$ ${\mathrm{SO}}_2$

3. ${\mathrm{CO}}_2$ $\mathrm{and}$ ${\mathrm{N}}_2\mathrm{O}$

4. ${\mathrm{CO}}_2$ $\mathrm{and}$ ${\mathrm{O}}_3$