The natural, clean air from outside, as opposed to the relatively stuffy air inside.
The replacement of stale or noxious air with fresh.
The bodily process of breathing; the inhalation of air to provide oxygen, and the exhalation of spent air to remove carbon dioxide.
An exchange of views during a discussion.
The mechanical system used to assist breathing.
The public exposure of an issue or topic.
The mechanical system used to circulate and replace air.