Allow the toxifier generator to be placed on the gravship substructure.
It will pollute and output power normally, and make nearby faction angry with your pollution once leaving.
Your ship wont be polluted when moving to another tile (note that pollution can still spread into your ship and kill your crop in the hydroponic, if you stay too long, but will be entierly gone when moving away), i suggest putting the generator on the outside of the ship.
I may expand upon the idea of a toxic gravship later on.
(change wastepack into fuel for example)
