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95.72% Carbon dioxide 2.7%Nitrogen

1.6% Argon

0.2% Oxygen

0.07% Carbon monoxide

0.03% Water vapor

0.01% Nitric oxide

2.5 ppm Neon

300 ppb Krypton

130 ppb Formaldehyde

80 ppb Xenon

30 ppb Ozone

10 ppb Methane

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15y ago

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