And when it comes to actual material productive industries, I always say we have two: killing people and burning oil.
Automobiles? Burning oil
Aviation? Mostly military planes, so both
Polymers and petrochemicals? Burning oil
Weapons manufacturing? Killing people
Construction? Ultimately, since the roads and bridges are all car-focused, burning oil.
Steel? Seems good at first, but it's ultimately going to be turned into a car (burning oil) or a weapon (killing people).
The cherry on top is that, because of climate change, all of the "burning oil" bits are also secretly killing people.