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The atmosphere of the Earth is composed of three main elements, then other trace substances. The main bulk of the atmosphere is formed of:

Nitrogen - 78%

Oxygen - 21%

Argon - 1%

The rest of the atmosphere is formed of trace substances:

Carbon Dioxide - 0.035%

Neon - 0.001818r%

Helium - 0.000524%

Methane - 0.0001745%

Krypton - 0.000114%

Hydrogen - 0.000055%

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13y ago

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