Public health officials tell us not to keep using mercury thermometers. The reason, if they break, the gas released is a serious health risk, especially to children. There is a good way to dispose of these. Always, drop it off at a hazardous waste collection location. Again, don’t toss a mercury thermometer in the garbage can. Finally, Mercury will contaminate the environment. The next time you visit a drugstore, purchase a mercury-free thermometer.