Consider the following statements:

I.	Noise was added as an air pollutant to the Air (Prevention and Control of Pollution) Act in 1987.
II.	Montreal protocol was signed in 1987 to control the emission of ozone-depleting substances.
III.	The Earth Summit for the conservation of biodiversity and sustainable utilization of its benefits was held in 1992.

Which of the above statements are true?

1.	I and II only	2.	I and III only
3.	II and III only	4.	I, II, and III

 

Consider the following statements:

Which of the above statements are true?

The following diagram shows the effect of sewage discharge on some important characteristics of a river. What can be A and B respectively?
   

The following diagram shows the working of an electrostatic precipitator. Identify the correct statement:
    

Which award is given to individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting wildlife?
1. Venu Menon Animal Allies Award
2. Amrita Devi Bishnoi Award
3. David Shepherd Wildlife Award
4. The Pledge Award

Read the following statements and chooser the correct option
Statement A: Electrostatic precipitator can remove over 99% particulate matter present in exhaust from a thermal power plant.
Statement B: According to CPCB particulate size 2.5m or less in diameter are responsible for causing the greatest harm to human health.
1. Only statement A is correct.
2. Only statement B is correct.
3. Both statements A and B are correct.
4. Both statements A and B are incorrect.

State True (T) or False (F) for the following statements and select the correct option
A. Motor vehicles equipped with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst.
B. Recently government of India has instituted the Amrita Devi Bishnoi Wildlife Protection Award for
individuals from urban areas that have shown extraordinary courage and dedication in protecting
wildlife.
C. Reforestation may occur naturally in a deforested area.
   A   B   C
1. T   T   F
2. T   F   T
3. T   F   F
4. F   F   T

Select the correct option regarding relative contribution of various greenhouse gases to total global warming.
1. ${\mathrm{CO}}_2>\mathrm{CFCs}>{\mathrm{N}}_2\mathrm{O}>{\mathrm{CH}}_4$
2. ${\mathrm{CH}}_4>{\mathrm{CO}}_2>{\mathrm{N}}_2\mathrm{O}>\mathrm{CFCs}$
3. ${\mathrm{N}}_2\mathrm{O}>{\mathrm{CO}}_2>\mathrm{CFCs}>{\mathrm{CH}}_4$
4. ${\mathrm{CO}}_2>{\mathrm{CH}}_4>\mathrm{CFCs}>{\mathrm{N}}_2\mathrm{O}$

Which one is not an example of primary pollutants?
1. DDT                  2. CO
3. Pollen                4. PAN

In which part of the atmosphere ‘good ozone’ is found?
1. Troposphere                       2. Stratosphere
3. Ionosphere                        4. Exosphere