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Air is that part of Earth's atmosphere that humans breathe and as such one of the four classical elements. Temperature and layers The temperature of the Earth's atmosphere varies with altitude the mathematical relationship between temperature and altitude varies among five Breathing takes Oxygen in and Carbon dioxide out of the body Aerobic Organisms require oxygen to create energy via respiration, in In traditional cultures air is often seen as a universal power or pure substance

Air may also refer to:

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AIR may refer to:

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Ayr may refer to Places Ayr, a town in south-west Scotland The River Ayr, on which the town stands Éire (ˈeːrʲə) is the Irish name for the island of Ireland and of the state of the same name.
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