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１市场缺陷和障碍１．１能效技术应用的缺失在美国，１９７３／７４年度石油禁运之后，能源效率受到高度关注。目前的美国能源强度大大低于１９７０年。但是，大量的工程经济研究表明，许多成本效益好的能效技术没有得到利用。如果这方面的投资相对比较小，或者对减少能源需求?
1 MARKET DEFECTS AND OBSTACLES 1.1 Lack of Energy Efficiency Applications Energy efficiency is of great concern in the United States after the 1973/74 oil embargo. The current US energy intensity is much lower than in 1970. However, a large number of engineering economics studies show that many cost-effective energy efficiency technologies are not utilized. If this investment is relatively small, or to reduce energy demand?