Minerals, Metals, and Other MaterialsNatural Substances |
What are some uses for coal other than as an energy resource? |
In the past, many of the aromatic compounds, such as benzene, toluene, and xylene were made from coal. These compounds are now chiefly by-products of petroleum. Naphthalene and phenanthrene are still obtained from coal tar. Coal tar, a by-product of coal, is used in roofing.