Chemical Engineering :: Environmental Engineering
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'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
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Inhalation of silica dust by human being causes
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Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage ?
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A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called
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A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.
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White smoke coming out of the chimney of a furnace indicates the use of
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TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes
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Sulphur dioxide present in the industrial chimney exhaust gases causes
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A man exposed to excessive noise level in the working environment may suffer from
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Which of the following is a secondary air pollutant ?
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