Environmental Tobacco Smoke (ETS), also known as second hand smoke, is the aged and diluted combination of:

  • the smoke that rises from the lit end of a tobacco product; and
  • the smoke exhaled by a smoker

There is no environment that is chemical and particle free. The vast majority of smoke constituents that contribute to ETS are already present in ambient (or outside) air from other sources. To investigate further, we have published research carried out in our laboratories measuring ETS and we have also co-authored indoor air quality studies.

Public health authorities around the world have concluded that second hand smoke from combusted tobacco products increases the risk of smoking-related diseases in non-smokers and we don’t challenge that message.