Comment by bob1029

The biggest issue with the interim onsite generation is the lack of meaningful stack height on the generating units.

Airplanes by virtue of their mode of operation stay out of the unhappy regime most of the time. Also, engines at/near idle produde orders of magnitude less emissions. Those aeroderivative generators are running at full capacity 24/7.

Dumping exhaust at ground level continuously is probably much worse than the airport. Even if it's a FedEx world hub.