The atmospheric portion of the biosphere occurs in the

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The atmospheric portion of the biosphere occurs in the troposphere, which is the lowest layer of Earth's atmosphere where living organisms reside and interact with their environment. The lithosphere is the solid outer layer of Earth, the ozonosphere is a region of the atmosphere that contains a high concentration of ozone, and the heterosphere refers to the upper layer of the atmosphere where gases are sorted by molecular weight.

The Atmospheric Portion of the Biosphere Occurs in the