EXAMIANS
Carcinogenic air pollutants cause
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Which of the following pollutants is absent in the emissions from a fertiliser plant ?
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Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
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The maximum CO₂ is emitted into the atmosphere by
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Beyond what concentration of H₂S in air, acute danger to human life exists?
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Water filtration rate in a slow sand filter ranges from __________ litres/m²/hr.
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Radioactive substances present in the polluted water stream can be removed by
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Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
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BOD of raw municipal sewage may be in the range of about __________ mg/litre.
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Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur?
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