Plin, proizveden pri ogrevanju asfalta

Hot asphalt emits gases predominantly composed of various hydrocarbons, particularly polycyclic aromatic hydrocarbons.

Asphalt’s composition includes asphaltenes, resins, saturated and aromatic hydrocarbons.

Due to the high-temperature treatment or extended evaporation of natural, petroleum, and coal tar asphalt, the heating process generates small molecular substances, chiefly long-chain and aromatic hydrocarbons, notably significant molecules such as naphthalene, anthracene, phenanthrene, and benzo[a]pyrene.

Polycyclic aromatic hydrocarbons are notably toxic and some are known carcinogens.