biosphere
Definition
Part of the Earth's surface and atmosphere that contains the entire terrestrial ecosystem, and extends from ocean depths to about six kilometers (3.7 miles) above sea level. Not precisely demarkable, it contains all living organisms and what supports them—soil, subsurface water, bodies of water, air—and includes hydrosphere and lithosphere. Also called ecosphere.
biosphere is in the Environment & Pollution Control subject.
biosphere appears in the definition of the following term: atmosphere
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