The Partnership for Action on Green Economy (PAGE), a UN mechanism to assist countries transition towards greener and more inclusive economies, emerged at

1. A

   The Earth Summit on Sustainable Development 2002, Johannesburg

   (a) The Earth Summit on Sustainable Development 2002, Johannesburg. Johannesburg was WSSD 2002 (Rio+10). PAGE was not launched there. This option is not the key.

2. B

   The United Nations Conference on Sustainable Development 2012, Rio de Janeiro

   (b) The United Nations Conference on Sustainable Development 2012, Rio de Janeiro. PAGE was born as a Rio+20 response to the green-economy agenda, a UN partnership to help countries go green and inclusive. This option is the official key.

3. C

   The United Nations Framework Convention on Climate change 2015, Paris

   (c) The United Nations Framework Convention on Climate change 2015, Paris. Paris is a climate COP (COP21), later than PAGE’s emergence. This option is not the key.

4. D

   The World Sustainable Development Summit 2016, New Delhi

   (d) The World Sustainable Development Summit 2016, New Delhi. TERI’s WSDS is a Delhi conference, not the UN origin of PAGE. This option is not the key.

Summary. Official key is (b). The Partnership for Action on Green Economy was framed at the 2012 Rio Conference on Sustainable Development (Rio+20), not at Johannesburg 2002, Paris 2015, or TERI’s 2016 Delhi summit. PAGE is a UN-agency cluster (ILO, UNEP, UNIDO, UNDP, UNITAR) for inclusive green economies. The stored letter is therefore (b).