How do EPA’s Clean Air Market Programs work?
Clean air markets include various market-based regulatory programs designed to improve air quality. These programs focus on lowering outdoor concentrations of fine particles, mercury, ozone, and other significant air emissions. The most well-known of these programs are EPA’s Acid Rain Program and the NOx Trading Programs, which reduce emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx)–compounds produced by fossil fuel combustion.