Originally Posted by
Gauges and Dials
Surely as a professional pilot you know that the impact on fuel consumption of added weight is vastly different for aircraft (where energy is consumed to counteract gravity as well as to overcome friction losses in moving the aircraft from point A to point B) than for wheeled vehicles (where energy is consumed only to overcome friction losses). The energy cost of "tankering" in a typical passenger automobile is probably very close to unmeasurably small.
Surely you would recognise that there are billions of "typical passenger automobiles" each putting out unmeasurably small amounts of emissions but combined would far exceed that of a few thousand aircraft that happen to be tankering.