COP 13, formally called the 13th session of the Conference of the Parties to the UN Framework Convention on Climate Change, was held in December 2007 on the island of Bali in Indonesia. Delegates from around 190 countries and regions gathered to work toward the prevention of global warming through discussions on the framework for greenhouse gas reductions after 2013. Although the United States and the EU differed on the setting of numerical targets, in the end the Bali Roadmap was adopted, and the conference closed with developed countries slated to set reduction targets before the conference two years hence, and developing countries are to pursue reductions in emissions through verifiable means.