The concentration of gases in the atmosphere available to the Spruce trees depends in the number of trees in each location.
The atmosphere contains a mixture of gases such as carbon dioxide, water vapor, oxygen and nitrogen.
Plant such as trees are known to contribute to the amount of gases present in the atmosphere.
Trees remove carbon dioxide from the atmosphere and release oxygen into the atmosphere.
Therefore, the concentration of gases available tongue Spruce trees depends in the number of trees in each location.
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