 Some of these measures include switching to safer (lower tar) cigarettes, switching to snus or dipping tobacco, or using a non-tobacco nicotine delivery systems.In recent years, the growing use of electronic cigarettes for smoking cessation, whose long-term safety remains uncertain, has sparked an ongoing controversy among medical and public health between those who seek to restrict and discourage all use until more is known and those who see them as a useful approach for harm reduction, whose risks are most unlikely to equal those of smoking tobacco.