Coal is used primarily in the United States to generate electricity. In fact, it is burned in power plants to produce more than half of the electricity we use.
We use petroleum products to propel vehicles, to heat buildings, and to produce electricity. In the industrial sector, the petrochemical industry uses petroleum.
It's an oral medication that is often used to treat certain types of female infertility. It stimulates the secretion of follicle-stimulating hormone (FSH).