What is Rio+20 Conference, often mentioned in the news?

1. The term 'Rio+20 Conference' refers to the United Nations Conference on Sustainable Development (UNCSD), which took place in Rio de Janeiro, Brazil, in June 2012. 2. It was nicknamed 'Rio+20' because it marked the 20th anniversary of the 1992 United Nations Conference on Environment and Development (UNCED), also known as the Earth Summit, held in the same city. 3. The main themes of the conference were building a green economy in the context of sustainable development and poverty eradication, and establishing an institutional framework for sustainable development. Option (A) correctly identifies this. 4. Option (B) is incorrect; Ministerial Meetings of the World Trade Organization (WTO) focus on international trade rules and negotiations. 5. Option (C) is incorrect; Conferences of the Inter-governmental Panel on Climate Change (IPCC) involve the assessment and reporting on the science of climate change. 6. Option (D) is incorrect; Conferences of the Parties (COPs) to the Convention on Biological Diversity (CBD) deal specifically with issues related to biodiversity conservation and use.