What is Rio+20 Conference, often mentioned in the news?
Explanation
Rio+20 is the official name for the United Nations Conference on Sustainable Development (UNCSD), held in 2012 to mark the 20th anniversary of the landmark 1992 Earth Summit. While it addresses biodiversity and climate, it is not a specific meeting of the Convention on Biological Diversity (Option D) or the IPCC, but rather a broader high-level UN summit focused on the "green economy" and poverty eradication. The core concept tested is the identification of major international environmental governance milestones and their specific institutional frameworks.