Dobson units are used to measure thickness of:
1. Ozone
2. Troposphere
3. CFCs
4. Stratosphere

Subtopic:  Ozone Layer Depletion |
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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 by low temperature 

Subtopic:  Ozone Layer Depletion |
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Montreal Protocol was signed in 1987 for the control of:

1. Emission of ozone-depleting substances

2. Release of Green House gases

3. Disposal of e-waste

4. Transport of genetically modified organisms from one country to another

Subtopic:  Ozone Layer Depletion |
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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

Subtopic:  Water Pollution: I | Water Pollution |
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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

Subtopic:  Air Pollution |
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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

Subtopic:  Air Pollution |
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Which of these following methods is the most suitable for disposal of nuclear waste?

1. Bury the waste within rocks, deep below the earth's surface

2. Shoot the waste into the space

3. Bury the waste under Antarctic ice-cover

4. Dump the waste within rocks under deep ocean

Subtopic:  Agrochemical & Radioactive Waste |
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Which of the following pairs of gases is mainly responsible for green house effect?

1. Carbon dioxide and methane

2. Ozone and Ammonia

3. Oxygen and Nitrogen

4. Nitrogen and Sulphur dioxide

Subtopic:  Green House Effect & Global Warming |
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Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:

1.  making tubes and pipes

2.  making plastic sacks

3.  use as a fertilizer

4.  construction of roads

Subtopic:  Solid Waste Pollution |
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Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

1. Geneva protocol

2. Montreal protocol

3. Kyoto protocol

4. Gothenburg protocol

Subtopic:  Ozone Layer Depletion |
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