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

Montreal Protocol was signed in 1987 for the control of:

Which of the ultraviolet radiation is lethal?
(1) UV-A

(2) UV-B

(3) UV-C

(4) All of these

A thin layer of ozone is present in the:
(1) Troposphere

(2) Lower stratosphere

(3) Upper stratosphere

(4) Mesosphere

Excess nitrates in drinking water can cause:

1. Itai–itai disease

2. Black foot disease

3. Methemoglobinemia (Blue baby syndrome)

4. Minamata disease

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

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