Extreme environments can be caused by a variety of factors that push equilibrium off.
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 .	temperature	temperature	pressure	pressure	oxygen	oxygen	carbon dioxide	carbon dioxide	atmosphere	atmosphere	radiation	radiation	acidity	acidity	alkalinity	alkalinity	sulphur	sulphur	petroleum	petroleum	toxic	toxic
