Share this credible answer with others. Simply paste this code into your blog or Web page:
Petroleum and substances obtained from it, which are mixtures of hydrocarbons , are classed together, because of their origin, as mineral oils. They are widely used as fuels, illuminants, and lubricants.
|
Answer verified with
|
HighBeam gives you access to newspaper, magazine, and trade journal articles plus press releases, facts, information, and biographies from thousands of sources.