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The predominant Green House gas is Water Vapor which makes up 2 to 5% of our atmosphere.

The second most common is CO2 which makes up 0.03% This is arguably up 0.007% over the past 150 years. It is also much lower today then in many periods in history.

The rest are in the parts per billion range.

Water vapor is the only one that is of consequence. The rest make up less forcing then the variance of water vapor.

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12y ago
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12y ago

The atmosphere is approximately 80% Nitrogen and 20% Oxygen.

There is a small amount of Carbon Dioxide and other trace gasses.

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12y ago

15% of carbon dioxide but i dont know about the others

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Q: How much of each greenhouse gas is there in the atmosphere?
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