biosphere
US /ˈbaɪ.oʊ.sfɪr/
UK /ˈbaɪ.oʊ.sfɪr/
1.
biosfera
the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
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The rainforest is a vital part of the Earth's biosphere.
La foresta pluviale è una parte vitale della biosfera terrestre.
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Understanding the biosphere helps us protect our planet.
Comprendere la biosfera ci aiuta a proteggere il nostro pianeta.