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Extreme environment
An
extreme environment
contains conditions that are hard to survive for most known
life forms
. These conditions may be extremely high or low
temperature
or
pressure
; high or low content of
oxygen
or
carbon dioxide
in the
atmosphere
; high levels of
radiation
,
acidity
, or
alkalinity
; absence of water; water containing a high concentration of salt or sugar; presence of
sulphur
,
petroleum
, and other
toxic
substances.
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