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

The correct option is: It is the United Nations Conference on Sustainable Development.

Step-by-Step Explanation:

1. Understanding Rio+20:
The term "Rio+20" refers to the United Nations Conference on Sustainable Development (UNCSD), which took place in Rio de Janeiro, Brazil, in June 2012. The name "Rio+20" marks the 20th anniversary of the historic 1992 United Nations Conference on Environment and Development (UNCED), commonly known as the Earth Summit, which was also held in Rio de Janeiro.

2. Key Goals and Focus:
The conference was organized as a joint endeavor of the United Nations to revitalize global commitment toward sustainable development. The primary objectives of Rio+20 were to secure renewed political commitment for sustainable development, assess progress and remaining gaps in the implementation of the outcomes of the major summits on sustainable development, and address new and emerging challenges.

3. Major Outcomes:
The conference resulted in a non-binding document titled "The Future We Want", in which member states renewed their commitment to sustainable development and agreed to establish a process to develop the Sustainable Development Goals (SDGs), which succeeded the Millennium Development Goals (MDGs) in 2015.

4. Why other options are incorrect:
- The Ministerial Meeting of the World Trade Organization (WTO) deals with global trade rules and negotiations, not sustainable development summits.
- The Intergovernmental Panel on Climate Change (IPCC) is a scientific body that produces assessment reports on climate change rather than hosting the Rio+20 conference.
- The Convention on Biological Diversity (CBD) holds its own Conferences of the Parties (COP) focusing specifically on biodiversity conservation, which is distinct from the broader Rio+20 Sustainable Development conference.