Origin: Greek prefix bio-
Biosphere has 2 different meanings across 1 category:
the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist
"Scientists are studying how rising temperatures might shrink the biosphere by forcing many species to migrate toward the poles."
The part of the Earth and its atmosphere capable of supporting life.
"Scientists are concerned that rising temperatures could eventually make parts of our biosphere uninhabitable for most known species."