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Ozone is produced in regions:

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A large hole in the ozone layer over antarctica region was discovered in:

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Ozone layer is high:

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The normal amount of overhead ozone is about in DU:

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Amount of ozone in atmosphere is expressed in units:

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Ozone gas has boiling point:

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Which oxidizing agent is eye irritant and toxic to plants?

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Condition for formation of smog are:

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The yellow colour in photochemical smog is due to the presence of gas:

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Photochemical smog consists of higher concentration of:

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Reducing smog contains:

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The word smog is combination of smoke anf

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The elevated concentration of metal causes clogs of gills in fish:

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Acidification of soil can leach metals:

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$SO_{2}$ in atmosphere changes to:

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$NO_{2}$ is atmosphere changes to:

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$CO_{2}$ in atmosphere changes to:

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Phenomenon of acid rains gain importance in:

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Angus Smith discovered in the mid of seventeenth century:

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Mean residence time of methane in atmosphere in years is:

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Paddy fields produce a significant amount of gas:

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Aerosols cause severe infections in old people of:

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Oxides of sulphur react in atmosphere by various reactions to form:

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Coal contains percentage of sulphur:

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The percentage of $SO_{2}$ produced by volcano is:

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