Any biological disaster, nuclear, chemical, or pollution. Any natural disaster dust storm, major volcanic erruption.
I would be more concerned with conditioning for biological and also natural. Example potential nuke. Or major volcano. If a major volcanic eruption erupted anywhere globally the fallout could mean immediate masks. The same if a few nukes more than one went off. Different masks.
Screw aliens.
The masks in this pandemic are simple policing. If you aren't wearing it you are infected. Simple psychology. It causes policing on those who aren't. Regardless of the profit immediately made from them and the fact they are a false positive and they also clinically make the wearer sicker.
Any biological disaster, nuclear, chemical, or pollution. Any natural disaster dust storm, major volcanic erruption.
I would be more concerned with conditioning for biological and also natural. Example potential nuke. Or major volcano. If a major volcanic eruption erupted anywhere globally the fallout could mean immediate masks. The same if a few nukes more than one went off. Different masks.
Screw aliens.
The masks in this pandemic are simple policing. If you aren't wearing it you are infected. Simple psychology. It causes policing on those who aren't. Regardless of the profit immediately made from them and the fact they are a false positive and they also clinically make the wearer sicker.