The 747 flight is one part of a deal signed by the airline, engine producer Rolls-Royce and aircraft manufacturer Boeing to research "greener" flying.
One of the four engines will run on a mixture of kerosene and a biofuel, and is set for late 2008 or early 2009. But Virgin Atlantic is planning to beat Air New Zealand to the punch by having its own biofuel flight early next year.
Will these posturings really solve the solution for a resource-depleted future?
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