Polycyclic aromatic hydrocarbons (PAHs) are a group of chemicals, over 100 in all, that many Americans may be exposed to. There are many varieties out there, but some of the most well-known are benzo(a)pyrene and naphthalene (used in mothballs). Most commonly, PAHs are released into the air when fossil fuels, gasoline and garbage are burned, but other routes of exposures -- such as eating

