The correct answer is Option 2: The United Nations Conference on Sustainable Development 2012, Rio de Janeiro.
The Partnership for Action on Green Economy (PAGE) is a UN mechanism that was created to support countries in their efforts to transition towards greener and more inclusive economies. It provides technical assistance, capacity building, and knowledge sharing to help countries develop policies and strategies that promote sustainable development.
PAGE was launched at the United Nations Conference on Sustainable Development (UNCSD) in Rio de Janeiro, Brazil in 2012. The UNCSD, also known as Rio+20, was a major international conference that brought together world leaders, policymakers, and civil society organizations to discuss sustainable development and the green economy.
The idea for PAGE emerged from a recognition that economic growth and development must be pursued in a sustainable and inclusive manner. The green economy is seen as a way to achieve this, by promoting economic growth while also protecting the environment and ensuring social equity.
Since its launch, PAGE has worked with a number of countries to help them develop and implement policies and strategies that promote sustainable development. It has also partnered with a range of organizations, including UN agencies, multilateral development banks, and civil society groups, to support these efforts.
In conclusion, the correct option is 2: The United Nations Conference on Sustainable Development 2012, Rio de Janeiro, where the Partnership for Action on Green Economy (PAGE) was launched to support countries in their transition towards greener and more inclusive economies.