In 1992, Earth summit was held for:

Control of emission of ozone depleting substances

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Conservation of biodiversity and sustainable utilisation of its benefits

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Control of disposal of waste

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Control of release of greenhouse gases

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Solution

The correct option is B Conservation of biodiversity and sustainable utilisation of its benefits
Earth summit was held in Rio de Janeiro for biodiversity conservation.

Montreal protocol was signed to control emission of O $_{3}$ depleting substances.

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