emissions (stationary source) - atmospheric pollutants from fossil fuel combustion in furnaces and boilers. Stationary combustion sources contribute significantly to total man-made emissions of sulfur oxides - predominantly sulfur dioxide (S0 2), with some sulfur trioxide (S03) - nitrogen oxides (NOx), and particulates, but emit comparatively minor amounts of carbon monoxide (CO) and hydrocarbons (HC). Means of controlling stationary source emissions include: flue gas scrubbing with a chemical substance such as sodium hydroxide to remove sulfur, burning naturally low-sulfur fuels, lowering combustion temperatures to reduce NOx formation, and using electrostatic precipitation to reduce particulate emissions. See emissions (automotive), pollutants.