Snow-blindness in Antarctic regions is due to:

1.	Inflammation of cornea due to high doses of UV-B radiation
2.	High reflection of light from snow
3.	Damage to the retina caused by infra-red rays
4.	Freezing of fluids in the eye because of the low temperature

A species that was introduced for ornamentation but has become a troublesome weed in India:

1. Parthenium hysterophorus

2. Eichhornia crassipes

3. Prosopis juliflora

4. Trapa Spinosa

Air (Prevention and Control of Pollution) Act was amended in 1987 to include among pollutants:

1. Vehicular exhaust

2. Allergy causing pollen

3. Noise

4. Particulates of size 2.5 micrometer or below

According to the Central Pollution Control Board [CPCB] what size (in diameter) of particulate is responsible for causing greater harm to human health?

1. 3.5 micrometers

2. 2.5 micrometers

3. 4.0 micrometers

4. 3.0 micrometers

If an agricultural field is liberally irrigated for a prolonged period of time, it is likely to face the problem of:

Which of the following is an innovative remedy for plastic waste?

1. Burning in the absence of oxygen

2. Burying 500 m deep below the soil surface

3. Polyblend

4. Electrostatic precipitator

Which of the following statements about ozone is correct?

1. Tropospheric ozone protects us from UV radiation

2. Stratospheric ozone is 'bad'

3. Tropospheric ozone is 'good'

4. Stratospheric ozone protects us from UV radiation

When domestic sewage mixes with river water:

''Good ozone'' is found in the:
1. Ionosphere
2. Mesosphere
3. Troposphere
4. Stratosphere

Consider the following statements (A-D) about organic farming:
 

Which of the above statements is correct?
1. (A) and (B) only 
2. (B), (C) and (D)
3. (C) and (D) only 
4. (B) and (C) only