Around one-quarter of aluminum use is in transportation. Increasing priority is being given today to reducing the weight of transportation hardware such as aircraft, trains, ships and motor vehicles in order to reduce energy consumption and pollution. In this respect aluminum has overwhelming advantages because of its combination of lightness and strength. In aircraft construction, aluminum is used for frames, exteriors, wiring and electrical systems; and in the automotive industry it is used for frames, bodies, blocks, pistons, valves, bumpers, wheels and other parts. The use of aluminum in trains, buses and boats is also steadily increasing.

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