Many other firms -- IBM -- are reducing their energy intensity routinely six percent a year by fixing up their plants, and they get their money back in two or three years.
很多其他公司，像是IBM，正在降低他们的能源密集度， 通过改进他们的工厂，每年一般能减少6%的消耗 两到三年内就能收回投资。½