Virgin flies biofueled jet from London

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Some analysts praised the jumbo jet test flight from London to Amsterdam as a potentially useful experiment. But others criticized it as a publicity stunt and noted scientists are questioning the environmental benefits of biofuels.

"This breakthrough will help Virgin Atlantic to fly its planes using clean fuel sooner than expected," Sir Richard Branson, the airline's president, said before the Boeing 747 flew from London's Heathrow Airport to Amsterdam's Schiphol Airport.

He said the flight would provide "crucial knowledge that we can use to dramatically reduce our carbon footprint," he said.

Sunday's flight was partially fueled with a biofuel mixture of coconut and babassu oil in one of its four main fuel tanks. The jet carried pilots and several technicians, but no passengers.

Virgin Atlantic spokesman Paul Charles predicted this biofuel would produce much less CO2 than regular jet fuel, but said it will take weeks to analyze the data from Sunday's flight.

"It's great that somebody like Richard is willing to put some of his billions into an experiment aimed at reducing the climate change impact of aviation," said James Halstead, an airline analyst at the London stockbroker Dawnay Day Lochart.

"But there are a lot of unanswered questions about the usefulness of biofuels in the battle against global warming," he said.

The flight is the latest example of how the world's airlines are jumping on the environmental bandwagon by trying to find ways of reducing aviation's carbon footprint.

These efforts have included finding alternative jet fuels, developing engines that burn existing fuels more slowly, and changing the way planes land.

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