This reduces both weight and cost, and also means that the design can easily be scaled up.

ECONOMIST: Pushing the envelope

For shipping, alleviating glass bottles significantly reduces the weight and the shape allows the wine to be packed more efficiently which results in a reduced amount of fuel needed to ship the wines.

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The lower weight reduces costs throughout the rest of the system, improving overall economics.

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The use of a rechargeable battery, which can be charged up with energy from the spring several times, and then occasionally topped up during use, dramatically reduces its size and weight.

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And the wings are the reason this plane is considered one of the most revolutionary in aviation history (the weight-saving reduces per-passenger fuel consumption by 20 percent).

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The EFOY is also standard equipment as back-up power for federal troops in Germany, because it reduces on-the-move weight compared to diesel generators.

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The efficiency produces all the torque needed to let a 165-pound person walk, but with just a 30W to 60W motor versus SPARKy's 150W -- a big help to battery life that also reduces the AMP-Foot 2.0's weight to that of the fleshy kind.

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Also, the test is done without air-conditioning, which reduces fuel economy, and without any popular options that add weight to vehicles, thereby making them less efficient.

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These are that eating a diet which is low in fat and high in starch reduces the risk to the consumer of developing heart disease and cancer, and also promotes weight loss.

ECONOMIST: Nutrition