Tar is a thick, black, sticky substance that is produced from the destructive distillation of organic materials, such as coal or wood. It is commonly used in road construction, where it serves as a binding agent in asphalt, helping to create smooth and durable surfaces for vehicles. In addition to its use in paving, tar has applications in roofing, waterproofing, and even medicinal products. It contains various compounds, including polycyclic aromatic hydrocarbons, which can be harmful in large quantities. Therefore, safety measures are important when handling or working with tar.