It has been tested in aeroplanes before, but now biofuels have made new aviation headlines.

On Monday 23 November KLM Royal Dutch Airlines transported passengers above the Netherlands for 90 minutes with one engine powered with a 50% mix of biofuel and 50% kerosene, the typical air craft fuel, which fuelled the three other engines.

Biofuel used on the flight reduces carbon dioxide emissions by up to 80% compared to conventional kerosene. ‘We hope to receive certification at the end of 2010.
Then the question is: how fast can we produce it?’ KLM CEO Peter Hartman says.

Experts say global aviation emissions could reach 2.4 billion tonnes in 2050, which would be 15-20% of all carbon dioxide permitted under a global agreement and a nearly four-fold increase on current levels.

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