Okay someone give us a place to start. Fighters, gound attack, bombing, ground support aircraft and so on. Take your pick. And you can also choose with the best and about it's weopons etc..
The effects of air planes in europe - increased emissions contributing to pollution in general and contributing to global warming. I think that applies to all classes including passenger vehicles. And thats before all the bombs, missiles, cannon get used
SS3589 - that's a heck of a big question to start up. Would you like to maybe refine it a bit, or at least put in a time-frame?