The key objective of which convention formed in 1992 was to provide an international framework within future actions could be taken to reduce the threat of global warming?

UNFCCC

The correct answer is Option 3 - UNFCCC

The key objective of the convention formed in 1992 to address global warming was the United Nations Framework Convention on Climate Change (UNFCCC).

The 1992 United Nations Framework Convention on Climate Change (UNFCCC) also provides that the parties should act to protect the climate system “on the basis of equity and in accordance with their common but differentiated responsibilities and respective capabilities.” The parties to the Convention agreed that the largest share of historical and current global emissions of greenhouse gases has originated in developed countries. It was also acknowledged that per capita emissions in developing countries are still relatively low. China, India, and other developing countries were, therefore, exempted from the requirements of the Kyoto Protocol. The Kyoto Protocol is an international agreement setting targets for industrialised countries to cut their greenhouse gas emissions. Certain gases like Carbon dioxide, Methane, Hydrofluorocarbons etc. are considered at least partly responsible for global warming - the rise in global temperature which may have catastrophic consequences for life on Earth. The protocol was agreed to in 1997 in Kyoto in Japan, based on principles set out in UNFCCC.