in the period 2005-2015. With this plan, the mayors are also formulating an ambition for Copenhagen to be CO2 neutral by 2025. March 18 topic The City of Copenhagen became the 100th participant of the Climate Neutral Network (CN Net), an initiative of the United Nations Environment Programme (UNEP) in February 2009. The City of Copenhagen, which will host the crucial UN Climate Change Conference in November 2009, is world-renowned for its green politics and eco-friendly life style. Under the vision of becoming a "climate capital of the world", Copenhagen has already cut its CO2 neutrality in 2025]