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The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. The atmosphere protects life on Earth by absorbing ...
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Education. Bringing research to the classroom to help improve learning and teaching. Read more about AIRs Education work >
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Air is the name given to the Earth's atmosphere used in breathing and photosynthesis. Air may also refer to: Air (music), a song-like vocal or instrumental ...
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The Association for Institutional Research (AIR) is the world's largest professional organization for institutional researchers. The organization is focused on ...
www.airweb.org

air n. A colorless, odorless, tasteless, gaseous mixture, mainly nitrogen (approximately 78 percent) and oxygen (approximately 21 percent) with lesser
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