Polycyclic aromatic hydrocarbons produced during combustion

Polycyclic aromatic hydrocarbons (PAHs) are produced during the incomplete combustion of organic material. PAHs can also be produced through natural, non-combustion processes, and they may be present in uncombusted petroleum. Uncombusted petroleum can be a direct source to the waters of... 

Benzo[a]pyrene is a widespread environmental pollutant, produced during the combustion of all types of organic material—gasoline, fuel oil, wood, garbage, and cigarettes. It is a polycyclic aromatic hydrocarbon (PAH), a class of compounds that are discussed further in Chapter 17. 

High molecular weight hydrocarbons are often produced during incomplete combustion and these are often carcinogenic. Polycyclic aromatic hydrocarbons (PAHs) are a good example of one class that has been relatively well studied . These are released from all types of combustion processes and can be particularly hazardous in residues from old coal gas plants. ... 

A very different type of food toxicity involves toxins that are produced during the food preparation process. For example, charbroiled meats or smoked products (e.g., fish, sausage) typically contain polycyclic aromatic hydrocarbons (PAHs), formed during the cooking process (including barbecuing). Therefore, you will be exposed to small amounts of these chemicals when you eat meats that have been char-broiled. PAHs are naturally produced through combustion. They are also formed from forest fires, and are considered products of incomplete combustion. PAHs are also present in diesel fuels and car exhaust, and in smoke released from chimneys. 

---