Which countries participated in the Copenhagen summit?

The Copenhagen Summit, formally known as the 2009 United Nations Climate Change Conference (COP15), saw participation from nearly 200 countries. Key attendees included major nations such as the United States, China, India, and members of the European Union. The summit aimed to negotiate a global framework for climate change mitigation and included representatives from both developed and developing countries. Notably, the conference was marked by significant discussions and disagreements on emissions targets and financing for climate adaptation.