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Some of the larger tranportation vehicles have been in need of efficiency upgrade for a while.
There are some articles (in pop mech/sci?) of the cargo freighters using massive wind sails/kite on a leg of the trip to take advantage of the constant trade winds, and I think Ford might incorporate a regenerative hydraulic system for their big trucks in start-stop situations.
Really old ideas that the big companies are scrambling for, now that fuel will be on the rise.
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Meanwhile other things are still happening.
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