The Kyoto Protocol (1997) was about

AProtection of the ozone layer

BReduction in greenhouse gas emissions ✓ Correct

CConservation of biodiversity

DLimiting the rise in global temperature to 2 degrees Celsius above pre-industrial times

Correct answer: (B) Reduction in greenhouse gas emissions

Explanation

The Kyoto Protocol of 1997 committed developed nations to cut greenhouse gas emissions.

Protecting the ozone layer is the aim of the Montreal Protocol, not Kyoto.

Conserving biodiversity is handled by the Convention on Biological Diversity.

Holding warming to two degrees is a later focus of the Paris Agreement.

Binding emission-reduction targets are the heart of the Kyoto Protocol.

It introduced mechanisms like emissions trading and the clean development mechanism.

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