Environmental Science
Biogas is the common name of:
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Indicate an air pollutant among the following:
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Gravity setting chambers are used in industries to remove ________?
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Permissible noise level at Residential area during night time is:
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Deforestation will decrease?
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Greenhouse effect is due to________?
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Acid deposition causes________?
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Acid rain is mainly caused by emissions of __________ in the atmosphere?
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One of the main function of the earth’s ozone layer is to ?
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