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"Big difference between miles per gallon economy achieved in lab tests and on the road, and even eco cars lag behind"
"Single-seater aircraft with 207ft wingspan aims to reach Morocco via Madrid and is being seen as a trial for a round-the-world flight"
"Astraea prototypes follow programmed instructions, with the aim that they could fly missions autonomously for days at a time"
"A group of European planemakers have asked political leaders to end the escalating trade spat over EU carbon charge"
"Health savings estimated at Â£1bn a year would offset shipping job losses from tighter emissions limits, report shows"
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