Global warming is one of the most profound threats of our time, and we’re already starting to feel the impacts – especially when it comes to extreme weather. From Hurricane Sandy to devastating droughts and deadly heat waves, extreme weather events threaten our safety, our health and our environment, and scientists predict things will only get worse for future generations unless we cut the dangerous global warming pollution that is fueling the problem. Power plants are the largest source of global warming pollution in the United States, responsible for 41 percent of the nation’s production of carbon dioxide pollution, the leading greenhouse gas driving global warming.