A mercury thermometer, a type of thermometer, is made of glass and contains a column of mercury that rises with body temperature. Mercury thermometers are widely used in the medical field and in ordinary homes, and are available in some pharmacies. Given the dangers of mercury in mercury thermometers, many countries have adopted bans on them, with Sweden banning the sale of all mercury-containing medical devices as early as 1992. Mercury pollution has attracted worldwide attention, and a legally binding international convention on mercury pollution control is likely to be introduced in June 2013 after several rounds of intergovernmental negotiations.