If we have any chance of avoiding the worst impacts of climate change, we will have to completely embrace renewable energy. The reason why is simple: Renewable energy produces little or no greenhouse gas emissions. Electricity production is over a third of U.S. GHG emissions, and the majority of those emissions are caused by coal-fired power plants, which produce about 25 percent of the nation’s emissions. While coal emits between 1.4 and 3.6 pounds of