The products of combustion. The extent to which combustion generates pollutants is measured in these emissions. Carbon-based fuels are the most commonly used, and the principal emissions are oxides of carbon, especially carbon dioxide. Most carbon fuels produce other emission products, including oxides of nitrogen, and more toxic emissions from trace amounts of sulfur, lead, mercury, and other elements that are contaminants of the complex compounds that make up carbon-based fuels. The phrase also applies to emission products of nuclear fuels.
Subjects: Public Health and Epidemiology.