biosphere
zone of life / global ecosystem
Noun
pl: biospheres
This term describes the thin, integrated layer of Earth where life exists, encompassing the land, water, and air. It emphasizes the interdependence of biological organisms and their physical environment as a single, planetary-scale system. In scientific discourse, it is treated as a singular global entity. While it can be used in the plural when discussing the theoretical biospheres of other planets, in the context of Earth, it is almost exclusively used as a singular noun.
Meanings
Noun
The regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms.
"The biosphere is a complex system where plants, animals, and microorganisms interact with their environment."