[NOTE: DUE TO LAND AROUND 1900 GMT)
A flight running on so-called 'greener fuel' is on its way from London to New York.
It's the first transatlantic, commercial airliner powered entirely by sustainable aviation fuel, or SAF.
But critics have called the Virgin Atlantic flight a 'gimmick', while others warn of the high costs associated with these fuels.
Sally Patterson has more.
IN Virgin Atlantic says
OUT SOC
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http://www.fsnradionews.com/feeds/1128-GreenerFlight-SP-generic.mp3