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In particular aviation planners are focusing on ways of cutting the amount of time planes spend queuing to take off and land, in the process burning large and unnecessary amounts of fuel (IATA estimates that airlines could cut their annual CO2 emissions by 12 percent if air-traffic control operations were more efficient).
CNN: Green wing:?can technology make flying more environmentally friendly?
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"Starting off the process you have to take a deep breath, " she said.
BBC: Passing the buck on poor teacher performance
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Unfortunately, because of the nature of air circulation, any downward-pointing force created aerodynamically generates a backward-pointing resistance in the process just as an increase in the lift of an aircraft wing as the flaps are lowered for take-off or landing creates more drag in the process, forcing the pilot to open the engine throttles to overcome the extra wind resistance.
ECONOMIST: CAR DESIGN