Chip fat
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How does Qantas fly on chip fat?

13 April 2012 Last updated at 16:43 BST

The Australian airliner Qantas has become one of the first to fly a commercial aircraft using biofuel.

On Friday a flight from Sydney to Adelaide went off without a hitch and Qantas says a complete move to biofuels could reduce airline carbon consumption by up to 60%.

Duncan Kennedy reports.