The Rio+20 Conference, often mentioned in the news, refers to the United Nations Conference on Sustainable Development. It took place in Rio de Janeiro, Brazil, in 2012. The "+20" in the name signifies that it was held twenty years after the historic Earth Summit, also held in Rio de Janeiro in 1992.
The Rio+20 Conference aimed to bring together world leaders, policymakers, and stakeholders to discuss and address sustainable development challenges and promote a more sustainable and inclusive global economy. The conference focused on two main themes: (1) a green economy in the context of sustainable development and poverty eradication, and (2) the institutional framework for sustainable development.
The outcome of the Rio+20 Conference was the adoption of a document called "The Future We Want," which emphasized the need for sustainable development, poverty eradication, and the integration of social, economic, and environmental dimensions.
Therefore, the correct answer is: "It is the United Nations Conference on Sustainable Development."