Step 1: Understanding the Concept:
The question asks about the origin of the international convention on climate change. This refers to the United Nations Framework Convention on Climate Change (UNFCCC).
Step 3: Detailed Explanation:
The United Nations Framework Convention on Climate Change (UNFCCC) was one of three conventions adopted at the "Rio Earth Summit" or the United Nations Conference on Environment and Development (UNCED), which was held in Rio de Janeiro, Brazil, in June 1992. The UNFCCC is an international environmental treaty aimed at stabilizing greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system.
- The Stockholm Conference (1972) was the first major conference on international environmental issues and led to the formation of the United Nations Environment Programme (UNEP).
- The Nairobi Conference often refers to the 1985 conference that reviewed the UN Decade for Women. The Nairobi Declaration (1982) was related to UNEP.
- The Vienna Convention (1985) was a framework for efforts to protect the ozone layer.
Step 4: Final Answer:
The convention on Climate Change (UNFCCC) was the outcome of the Rio De Janeiro Conference in 1992.