Abba star BJORN ULVAEUS is selling the private plane he purchased to travel in post-September 11 - because it guzzles too much fuel. The Dancing Queen singer bought the Cessna 560XL to avoid airport queues in the aftermath of the terrorist atrocities, but he's become unhappy with its damaging effect on the environment - and his bank balance. Consequently, the Swedish star rarely uses the jet now - so he's decided to offload it. Ulvaeus' accountant Lars Hogberg says, "Bjorn bought the plane after the 9/11 tragedy because flying anywhere was proving more complicated with airport queues and delays. "However, the plane uses up lots of fuel."