The idiom "black gold" originated from the early 20th century and is used to refer to petroleum or oil. The term gained popularity due to the significant economic value and widespread use of oil as a natural resource. The black color of crude oil, combined with its immense value, led to the analogy of it being akin to gold. The phrase "black gold" became a metaphorical representation of the immense wealth and economic power associated with the oil industry.

Definición y significado de "black gold"en inglés

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