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So does "dump fuel" literally mean "sprinkle a large volume of jet fuel over a large swathe of countryside?" Does it become diffuse enough that the environmental impact is negligible, or do we get a big splash that kills everything in an AoE?
Like... I'm surprised the fuel cost is the focus here, and not the environmental impact of releasing jet fuel just... into the air I guess? But maybe it doesn't work the way I'm picturing.
Dumping fuel is not uncommon.
The plane needs to be a certain weight to land and so fuel burn is calculated into that.
Obviously planes don't intend to dump fuel but there are unforeseen circumstances which mean necessitate this.
It's hard to say but I should imagine dilution, has a large impact on any sort of environmental concerns.