In December 2015, world leaders will convene in Paris to negotiate an international agreement to address the serious threat of global warming. As the country responsible for more climate-changing pollution in the atmosphere than any other, the United States has a moral obligation to lead the world into action.The best way to lead is by example. And, as this report demonstrates, the United States is doing just that. By following through and fully implementing policies already enacted at the state and federal levels – including the Clean Power Plan, the first national policy to limit climate pollution from power plants – the nation can reduce carbon dioxide pollution from fossil fuel combustion (the leading cause of global warming) by 27 percent below 2005 levels by 2025