Wind power has made significant advances in efficiency and scale in recent years, but wind-turbines are still able to handle only one of many wind-speed categories.

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Working through grantees, it has had significant impact on promoting adoption of state and federal vehicle efficiency standards, more stringent residential and commercial building codes to reduce energy consumption, and development of renewable energy technology.

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This has significant cost implications for the NHS at a time when we have to make efficiency savings.

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Groupon, instead, has built an admirable infrastructure that lacks significant economies of scale, especially since it must face challenges from other digital efficiency masters like Google, Facebook and Amazon.

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