Which of the following countries is considered to be the world's most efficient user of energy?

Name: Which of the following countries is considered to be the world's most efficient user of energy?
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As countries industrialize, energy sources are not always efficiently utilized. In comparison with Japan, possibly the world's most efficient user of energy, where less than 5 ounces of oil is needed to generate $1 in GNP, in China, approximately 80 ounces of oil is needed.

Which of the Following Countries Is Considered to Be the World's