"Power plants are the nation’s single largest source of climate change-causing air pollution, pumping roughly 2.4 billion tons of carbon dioxide into the air each year,1 accounting for over one-third of all U.S. carbon pollution. Currently, there are no limits on the amount of carbon pollution that can be released from power plant smokestacks and this air pollution results in higher average temperatures, extreme weather, and serious impacts on public health and wildlife." (Quoted from paper)