Devil In The Details: Is Copenhagens 2 ºC Guardrail Obsolete?
Green Car Congress
DECEMBER 16, 2009
Global 2ºC maximal warming limit as compared to past and. From the opening day of the United Nations Framework Convention on Climate Change (UNFCCC) climate negotiations in Copenhagen, also known as Conference of Parties (COP) 15, the relevance of a key threshold metric—the 2 °C maximal warming limit, or “guardrail”—has repeatedly been called into question by delegates of COP member states which are particularly vulnerable to climate change. by Jack Rosebro.