10th session of the Conference of Parties (COP 10), 6 - 17 December 2004, Buenos Aires, Argentina. COP 10 was held at "La Rural", Av. Sarmiento. The sessions of the Subsidiary Body for Scientific and Technological Advice (SBSTA 21) and the Subsidiary Body for Implementation (SBI 21) was held in conjunction with COP 10 (6 – 14 December). COP 10 marked the 10th anniversary of the entry into force of the Framework Convention on Climate Change, which served as a central theme for the meeting. In addition to the accomplishments of the past ten years and future challenges, discussions at COP 10 highlighted a range of climate-related issues including, the impacts of climate change and adaptation measures, mitigation policies and their impacts, and technology. Participants had also taken stock of the entry into force of the Kyoto Protocol.
The high-level segment took place from 15–17 December and included four panel discussions among ministers and other heads of delegations.