The Kyoto Protocol,adopted in 1997,committed industrialised countries listed in Annex I of the UNFCCC to legally binding emission reduction targets for a first commitment period. It also created market mechanisms such as emissions trading and the Clean Development Mechanism. The stem clearly refers to binding greenhouse gas reduction targets for developed countries,which identifies the Kyoto Protocol. Hence Option B is correct.
Option A:
Montreal,as used in the Montreal Protocol,relates to ozone layer protection rather than greenhouse gas control. Although both agreements concern the atmosphere,they have different objectives,so Montreal is not the right answer here.
Option B:
The Kyoto Protocol represents an early attempt to operationalise the UNFCCC’s goal of stabilising greenhouse gas concentrations. Its legally binding targets for developed (Annex I) countries match the stem.
Option C:
The Cartagena Protocol deals with biosafety,particularly the transboundary movement of living modified organisms. It does not set greenhouse gas emission targets.
Option D:
Doha is associated with an amendment extending Kyoto commitments,not the original protocol establishing binding targets referred to in the stem.
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