This game is set at the international meeting held in Copenhagen in December, 2009 to negotiate a treaty to replace the Kyoto Treaty. Before the game, students need to understand the basics of the greenhouse effect, the carbon cycle, and the feedback mechanisms in the global climate. This material is included in the game book. During the game, students representing the IPCC present the case for human induced climate change and argue for immediate action. Climate deniers challenge the scientific basis for this. The game then moves to a discussion of the impact of climate change on developing nations and the philosophical and moral implications of continued pollution. Finally, the national representatives attempt to formulate a treaty that the major polluters can sign.