Oxygen is MAGNETIC?!

Oxygen is paramagnetic, nitrogen is diamagnetic. That means oxygen is attracted to the strongest part of a magnetic field, while nitrogen is repelled from there.

I remember years ago reading about a gadget that Toyota were working on, passing air through a magnetic field from the intake to a car’s ventilation system, to enrich the oxygen content of the air entering the passenger compartment. Not sure how practical it was with gaseous oxygen and nitrogen...