"Police" refers to the organized civil force for maintaining law and order, while " cop " is an informal term for an individual police officer. The Conference of the Parties ( COP ) to the UN Framework Convention on Climate Change (UNFCCC) is an international climate summit, which is held annually unless the Parties (the countries involved) decide otherwise. At COPs, world leaders gather to work together on solutions to tackle climate change. There are now 198 Parties (197 countries plus the European Union) to the Convention, constituting near universal membership. What is COP? COP is an international climate meeting held each year by the United Nations. COP is short for “Conference of the Parties ,” meaning those countries who joined—are “party to,” in legal terms—the international treaty called the U.N. Framework Convention on Climate Change (UNFCCC).