The Convention on Biodiversity (CBD) was opened for signature during:

The Convention on Biological Diversity was opened for signature at the Earth Summit in 1992.

This gathering, the Rio Earth Summit, was the UN Conference on Environment and Development.

The Montreal Protocol addresses ozone-depleting substances rather than biodiversity.

The Kyoto Protocol sets greenhouse gas cuts and came years later under the climate convention.

The Stockholm Convention deals with persistent organic pollutants, a separate treaty.

The convention rests on conservation, sustainable use and fair sharing of genetic resources.