Some end up as potentially dangerous litter. These potentially damaging compounds are called xenobiotics. Antioxidants are important groups of compounds that may help remove potentially harmful chemicals. This method is known to increase risk of increasing bias and potentially false conclusions. The mixture must be sterile in order to avoid introducing potentially harmful microbes. Normally, it will ask for confirmation of the potentially dangerous action. Human feces contains a variety of potentially harmful human pathogens. War leads to forced migration causing potentially large displacements of population. This is a list of potentially habitable exoplanets and possible exoplanets. Blunt shared a part in the difficult task of addressing the potentially violent international incident. Condoms may also be useful in treating potentially precancerous cervical changes. Several case reports show temporal associations between interventions and potentially serious complications. Nicotine is regarded as a potentially lethal poison. Actuators are used in applications where potentially explosive atmospheres may occur. There are concerns over a number of potentially toxic Chinese herbs.