Coal byproducts are materials produced during the processing and combustion of coal. These byproducts include substances like fly ash, bottom ash, and coal slag, which can be used in various applications, such as construction and road building. They are often repurposed to reduce waste and minimize environmental impact. Another significant byproduct is coal tar, a thick liquid that contains numerous organic compounds. It can be used to produce pavement sealants, roofing materials, and even some medicinal products. Proper management of coal byproducts is essential to ensure they are used safely and effectively.