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

1. Damage to eyes
2. Increased liver cancer
3. Increased skin cancer.
4. Reduced Immune system

Which one of the following is a wrong statement? 

1. Most of the forests have been lost in tropical areas.
2. Ozone in upper part of atmosphere is harmful to animals.
3.Greenhouse effect is a natural phenomenon.
4. Eutrophication is a natural phenomenon in freshwater bodies.

Good ozone is found in the 

1. mesosphere

2.troposphere

3. stratosphere

4. ionosphere

Which country has the greatest contribution for the hole formation in ozone layer?

1. Russia

2. Japan

3. USA

4. Germany

The ‘thickness’ of Stratospheric Ozone layer is measured in/on:
1. Sieverts units
2. Dobson units
3. Melson units
4. Beaufort Scale

The lowest layer of earth's atmosphere is :

1. troposphere

2. stratosphere

3. mesophere

4. ionosphere

Ozone depletion in the stratosphere is mainly caused by:

1. SO₂

2. NO₂

3. NO

4. chlorofluorocarbons

Gas that is not a pollutant is : 

1. Carbon monoxide

2. Nitrogen peroxide

3. Carbon dioxide

4. Sulphur dioxide

Air pollution from the leakage of methyl isocyanate gas from the union carbide factory in Bhopal caused a major tragedy on:

1. Dec. 2, 1984

2. Dec 15, 1983

3. Dec.10, 1982

4. Dec. 4, 1988

Eutrophication of a lake means, it:

1. is low in nutrients

2. is high in nutrients

3. has a high temperature

4. has an lesser amount of organic matter