Oil is black and this, in contrast to the crystalline transparency of water, contributes to the great mystery associated with finding and producing oil. But, it can also be said that the "first" color of oil is green. The greenback, both literally and figuratively, has always defined the value of oil. Oil is also red, white and blue. With roots in northwest Pennsylvania and with the giant ghost and modern manifestations of John D. Rockefeller, no industry better exemplifies certain traits that define the American character. The color red also represents the blood of the millions who died in two great world wars and many other conflicts in this century.
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机译：石油是黑色的，与水的晶体透明性不同，它是与发现和生产石油有关的巨大谜团。但是，也可以说油的“第一”颜色是绿色。无论从字面上还是在比喻上，美元始终定义了石油的价值。油也是红色，白色和蓝色。根植于宾夕法尼亚州西北部，有着巨大的幽灵和约翰·D·洛克菲勒（John D. Rockefeller）的现代表现，没有哪个行业可以更好地体现某些定义美国特色的特征。红色也代表在本世纪两次世界大战和许多其他冲突中死亡的数百万人的鲜血。
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