the biosphere
The portion of the atmosphere from sea-level to about 4000 meters in which it is possible to breathe without technological assistance.
A surrounding area or place (especially of an urban settlement); an environment.
To cover, enclose, or envelop (someone or something).
To encircle or surround (someone or something).
Of a person: to be positioned or stationed around (someone or something) to attend to or protect them.
To encircle or surround (someone or something) so as to attack from all sides; to beset.
Of a situation or state of affairs, especially danger or trouble: to happen to and affect (someone or something).
Followed by from: to hide or shield (someone or something).