Pakistan has felt let down by America's failure to back it in its wars against India, and abandoned when, after helping Pakistan fuel the anti-Soviet resistance in Afghanistan in the 1980s, America turned its attention elsewhere.

ECONOMIST: Banyan

They are more aerodynamic and have low-rolling-resistance tires to boost fuel efficiency.

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And the difference between a machine-made hull and one shaped by Saito is significant: with the right curve, a boat will glide through the sea with less resistance and burn less fuel.

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Reduce wind resistance and you can reduce fuel consumption by several percentage points.

ECONOMIST: Fuel economy

Developing lightweight materials, such as low-cost carbon fiber composites (CFC's), that will improve fuel efficiency, performance, and corrosion resistance of the next generation of automobiles, aircraft, ships and trains.

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Bridgestone says that Ecopia tires (as seen on the Nissan Leaf) improve rolling resistance 36 percent, which means a 4 percent fuel economy improvement (5 percent for Dueler truck tires).

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