1,3-Butadiene is an environmental factor that can be found in air pollution and can be produced by combustion engines, as well as petroleum refineries. It is found in cigarette smoke and is also used in the making and processing of certain synthetic rubber products and fungicides. The National Toxicology Program has labeled 1,3-Butadiene as definite human carcinogen. The EPA has stated that people are mainly put in contact with this chemical through the means of simple inhalation.
