Filter/dilution tunnel. A smoke sample is drawn via a tube the place it can be diluted with air, the resulting smoke/air mixture is then pulled via a filter and weighed. This is the internationally recognized method of measuring smoke from combustion.[sixty six] DNA. Arsenic, nickel and radioactive polonium injury https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/