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.

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.