Equally undisputed is that moving a given load a given distance by air, uses many times the amount of fuel, and produces many times the amount of harmful gases, as moving the same load the same distance by trucks and tankers.
I would suggest that is very much disputed if it comes to fuel tankering. Given that the flight is going anyway the only consideration is the extra fuel burn of the carriage of fuel which I would suggest over long distances is more efficient in a aeroplane, and that's before we calculate the environmental impact of the road.