Asphalt is a naturally occurring dark brown or black mineral substance, one of several hydrocarbons known as bitumens. Asphalt is mixed with stone and gravel to form roads and streets. The mineral mixture known as asphalt can be refined from oil but it also occurs naturally in places where crude petroleum seeps through cracks and fissures in the earth’s crust and works its way to the surface.
Since asphalt is made entirely from oil, a large amount of asphalt requires a great amount of oil and a small amount of asphalt requires minimal oil inputs.
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