Florida ranks forty-fifth in total energy use, despite the heavy reliance on air conditioners and pool pumps. This includes coal, natural gas, petroleum, and retail electricity sales. About 4 percent of energy in the state is generated through renewable resources. Florida produces 6.0% of the nation's total energy, while total production of pollutants is lower, with figures of 5.6 percent for nitrogen oxide, 5.1 percent for carbon dioxide, and 3.5 percent for sulfur dioxide.