Parameter Tree:
EARTH SCIENCE > ATMOSPHERE > AIR QUALITY > VOLATILE ORGANIC COMPOUNDS

Definition:
Organic compounds (e.g. ethylene, propylene, benzene, styrene, acetone)
which evaporate readily and contribute to air pollution directly or
through chemical or photochemical reactions to produce secondary air
pollutants.  


Reference:
Dictionary of Environmental Science and Technology, John Wiley & Sons,1996.