volatile organic compound

Carbon-containing compound that readily produces fumes. Volatile organic compounds (VOCs) are created both by natural processes and through human activity. They react with nitrogen oxides, an air pollutant, in sunlight to produce photochemical smog. Some VOCs include formaldehyde, benzene, and toluene. Many building and decorating supplies, art materials and plastics may release VOCs, especially in hot or humid conditions. For more information on VOCs, see the U.S. Environmental Protection Agency (EPA) factsheet on VOCs .