The gas that damages the ozone layer is -
1. CFCs
2. CO2
3. CH4
4. SO2
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The phenomenon in which atmospheric gases trap the heat radiations from the sun near the earth’s surface and keeps it warm is known as-
1. Natural greenhouse effect
2. Tyndall effect
3. Heating effect
4. Joule’s effect
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The main air pollutant among the following is :
1. CO
2.
3.
4. Sulphur
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Pollution can be controlled by-
1. Sewage treatment.
2. Checking atomic blasts.
3. Manufacturing electrically operated vehicles.
4. All of the above.
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If water pollution continues at its present rate, it will eventually :
1. Stop the water cycle.
2. Prevent precipitation.
3. Make oxygen molecules unavailable to water plants.
4. Make nitrate molecules unavailable to water plants.
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Domestic waste will lead to :
1. Biodegradable pollution
2. Nondegradable pollution
3. Thermal pollution of soil
4. Air pollution
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If a lake is contaminated with DDT, it's highest concentration would be found in :
1. Primary consumer
2. Secondary consumer
3. Tertiary consumer
4. None of the above.
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The ozone layer of the upper atmosphere is being destroyed by :
1. Sulphur dioxide
2. Carbon dioxide
3. Chlorofluorocarbon
4. Smog
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Acid rain is due to an increase in the atmospheric concentration of :
1. Ozone, and dust
2. and CO
3. and CO
4 and
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Soil erosion can be prevented by :
1. Overgrazing
2. Removal of vegetation
3. Afforestation (Plantation)
4. Increasing bird population
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