Klimaforum09 - People's Climate Summit, an open and alternative climate conference in December 2009, was attended by about 50,000 people.
Environmental activists from regions of the world most affected by climate change convened in Copenhagen at Klimaforum09 with leaders such as Vandana Shiva, founder of Navdanya, Nnimmo Bassey, chair of Friends of the Earth International, and author Naomi Klein.
A People's Declaration from Klimaforum09 was formulated before and during the People's Climate Summit calling for "System change - not climate change" and handed over to the 15th Conference of the Parties of United Nations Framework Convention on Climate Change at 18 December.
Klimaforum09 took place from 7 December to 18 December 2009 in the DGI-byen conference center, near the Copenhagen Central Station, as open and alternative event during UNFCCC COP15. The summit with over 300 debates, exhibitions, films, concerts and plays was organised by the Klimaforum network, a broad network of civil society organisations, and realized with the help of hundreds of volunteers.
- Monbiot, George (19 December 2009). "Copenhagen negotiators bicker and filibuster while the biosphere burns". London: The Guardian. https://www.theguardian.com/environment/2009/dec/18/copenhagen-negotiators-bicker-filibuster-biosphere. Retrieved 19 December 2009.
- UNFCCC Webcast (18 December 2009). "15th Conference of the Parties (COP) 11th Conference of the Parties to the UNFCCC serving as the meeting of the Parties to the Kyoto Protocol (CMP),Copenhagen/Denmark, 18 December 2009, Statements from observer organizations [COP agenda item 10 and CMP agenda item 16"]. UNFCCC. http://cop15.meta-fusion.com/kongresse/cop15/templ/play.php?id_kongressmain=1&theme=unfccc&id_kongresssession=2745. Retrieved 18 December 2009.
- Foreningen Civilsamfundets Klimaforum (12 December 2009). "A People's Declaration - System change - not climate change". Foreningen Civilsamfundets Klimaforum. http://klimaforum.org/declaration_english.pdf. Retrieved 12 December 2009.
- Foreningen Civilsamfundets Klimaforum (3 March 2010). "Klimaforum09 - Evaluation Report". Foreningen Civilsamfundets Klimaforum. http://klimaforum.org/Evaluation_Report_Klimaforum09_090310.pdf. Retrieved 3 March 2010.