extreme environment
Refers to environments with severe conditions, such as deep sea, outer space, or polar regions. Often used in scientific and technical contexts.
Research on microorganisms living in extreme environments is advancing.
Space is one of the extreme environments for humans.
A more general phrase meaning 'harsh environment', not necessarily as technical or extreme as 極限環境.
extremophile
Compound of 極限 (extreme limit) and 環境 (environment).