If we could figure out how to improve the efficiency with which we use energy, we can do a lot more work with the energy that is available.

如果我们能弄清楚如何提高我们使用能源的效率，我们就能用可利用的能源做更多的事情。

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This will only be possible if we rely on greater energy efficiency and the use of renewable energy sources worldwide.

只有当我们依赖更高的能效，在全球范围内使用可再生资源，这一切才有可能。

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Virtualization improves energy efficiency through optimized use of computing capacities and reduced use of electricity when not needed.

虚拟化通过优化计算能力的使用并在不需要时减少电能的使用来提高能效。

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to put in place policies that incentivizes people to use things such as energy efficiency

他们制定了一些政策，鼓励人们使用能效高的产品，

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The more efficient we are in our energy use, the more energy we will use because efficiency makes it cheaper to consume.

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It also aims to double the use of both energy efficiency tools and renewable energy fuels during the same time period.

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McCain also said the government should use its purchasing power to promote energy efficiency, buying fuel-efficient vehicles and retrofitting federal offices to use less electricity.

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