Smokers don’t just hurt themselves by their harmful habit. Secondhand smoke kills, too, and the workplace is one place where people should be especially concerned about exposure, reports HealthDay News.

In the United States alone, the American Cancer Society says secondhand smoke is responsible for an estimated 35,000 to 40,000 deaths from heart disease in people who are not current smokers and about 3,000 lung cancer deaths in nonsmoking adults. The unwelcomed pollutant also causes other respiratory problems in nonsmokers, including coughing, phlegm, chest discomfort and reduced lung function.

Three places where people should be especially concerned about exposure to secondhand smoke are:

  • Your workplace: OSHA has classified secondhand smoke as a potential cancer-causing agent.

  • Public places: Everyone is vulnerable to secondhand smoke exposure in places such as restaurants, shopping centers, public transportation, schools and day-care centers.

  • Your home: Any family member can develop health problems related to secondhand smoke. A smoke-free home will protect your family, guests and even your pets.