Air

Air is a name for the mixture of gases present in the Earth's atmosphere. Compressed air is often used in scuba diving as a shallow water breathing gas and to inflate buoyancy devices. Compressed air is also used as a source of energy for pneumatic tools.

Other meanings

Air is one of the four Classical elements.
Air is a French electronic music duo.
Air is a Japanese band fronted by Koji Kurumatani, formerly of Baku.

Look up Air in Wiktionary, the free dictionary

To air an audiovisual production means to broadcast it.
Air is also the name of a well-known renai game by Key.
Air with variations, BWV 991, is a baroque clavier work composed by J.S.Bach.

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