why is petroleum known as black gold?
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gold is very important in our life.it is very expensive and hard to get.similarly petroleum is very important-for fuel in vehicles,machines,etc. if we use it all then we will not get any more of it!since due to the pressure,heat during formation,it gets a black color.so petroleum is termed as blackgold.
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Answer: This because when crude oil is extracted from the land it is black in colour. This resource is compared to gold due to it's valuable properties and worth too.
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