During the past 20 years, the oil industry has begun a gradual transition away from light oils, which are being consumed progressively, toward heavier oils. But transporting heavy oils cost-effectively is a big challenge because heavy oils are viscous--essentially a thick, sticky and semifluid mess.
During the past 20 years, the oil industry has begun a gradual transition away from light oils, which are being consumed progressively, toward heavier oils. But transporting heavy oils cost-effectively is a big challenge because heavy oils are viscous--essentially a thick, sticky and semifluid mess.
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