The processes of calcination and roasting in metallurgical industries, respectively, can lead to :

Global warming and photochemical smog

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Photochemical smog and global warming

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Global warming and acid rain

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Photochemical smog and ozone layer depletion

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Solution

The correct option is C Global warming and acid rain
In Calcination and roasting $C O_{2}$ and $S O_{2}$ are released which are responsible for Global warming and acid rain.

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