How is air made on Earth?
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The air in Earth's atmosphere is made up of approximately 78 per cent nitrogen and 21 per cent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.
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Air is mostly gas.
The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.
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