title: Keys to Copenhagen.
mesh_terms: D003226:Congresses as Topic; D003365:Costs and Cost Analysis; D003718:Denmark; D004736:Energy-Generating Resources / Q000191:economics; D057232:Global Warming / Q000517:prevention & control*; D017752:Greenhouse Effect / Q000517:prevention & control*; D007391:International Cooperation; D011210:Power Plants / Q000191:economics; D014481:United States