An extreme environment refers to an environment that is not the normal environment in which life flourishes. Surviving in such environments is very difficult for all life forms

For example a Desert where temperature goes to around 50 degrees can be considered an extreme environment.

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does bacillus live in a extreme enviorment

Greenland is an example of a extreme environment because the weather conditions and the arctic deserts that surrond it.

Objects in space experience extreme temperatures in space becuase space is a vacuum.