The Copenhagen Summit for Climate Change, 2009 saw

The 2009 Copenhagen Summit (COP15) resulted in the Copenhagen Accord, a non-binding political agreement among participants regarding CO2 emission reductions [2]. The Accord explicitly stated that deep international emissions cuts were necessary to limit global temperature increases to below 2 degrees Celsius [1]. While it was not a legally binding treaty, it provided for explicit emission pledges by all major economies, including major developing nations like China and India for the first time [t1]. The Accord was brokered by a small group of leaders, including the United States and the BASIC bloc (Brazil, South Africa, India, and China), and was subsequently 'noted' by the COP plenary [c1][t2]. Although there was significant discord between developed and developing nations regarding binding targets, the participants did reach a consensus on the need for global emission mitigation and financial assistance for adaptation [c1][t3].

Sources

1. [1] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 24: Climate Change Organizations > 24.4, CAP $ COPENHAGEN SUMMIT > p. 327
2. [2] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 5: Biodiversity and Legislations > coPEnhagEn SummIt. > p. 8