Not easy to get 193 nations to agree on something as contentious as climate change. Great job by President Obama U.N. chief says 'we have a deal' on climate change - USATODAY.com Two weeks of wrangling at Copenhagen exposed sharp divisions between rich and poor nations and even among major greenhouse-gas emitters like China and the United States on how to fight global warming. Yet in the end, nearly all 193 nations at the U.N. climate conference agreed to President Barack Obama's solution, which points toward deeper emissions cuts for rich nations but without mandatory targets that would draw sanctions. Obama's successful 11th-hour bargaining Friday with China, India, Brazil and South Africa the world's key developing nations sets the stage for future cooperation between developed and developing nations. But the resulting "Copenhagen Accord" was protested by several nations that demanded deeper emissions cuts by the industrialized world and felt excluded from the major-nation bargaining process.