Many compounds of smoke from fires are highly toxic and/or irritant.
Smoke can obscure visibility, impeding occupant exiting from fire areas.
The composition of smoke depends on the nature of the burning fuel and the conditions of combustion.
Smoke inhalation can therefore quickly lead to incapacitation and loss of consciousness.
Smoke inhalation is the primary cause of death in victims of indoor fires.
The visible particles in such smokes are most commonly composed of carbon (soot).
Fires with high availability of oxygen burn in high temperature and with small amount of smoke produced; the particles are mostly composed of ash, or in large temperature differences, of condensed aerosol of water.
Smoke is the airborne solid and liquid particulates and gases evolved when a material undergoes pyrolysis or combustion, together with the quantity of air that is entrained or otherwise mixed into the mass.
Some components of smoke are characteristic for the combustion source.
Smoke is sometimes used as a flavoring agent and preservative for various foodstuffs.
Hardwood vs softwood smokes differ in the ratio of guaiacols/syringols.
A cloud of smoke, in contact with atmospheric oxygen, therefore has the potential of being ignited either by another open flame in the area, or by its own temperature.
Smoke from oxygen-deprived fires contains a significant amount of compounds that are flammable.
Smoke is also sometimes a component of internal combustion engine exhaust gas, particularly diesel exhaust.
The smoke kills by a combination of thermal damage, poisoning and pulmonary irritation caused by carbon monoxide, hydrogen cyanide, and other combustion products.
Guaiacol and its derivates are products of pyrolysis of lignin and are characteristic for wood smoke; other markers are syringol and derivates, and other methoxy phenols.
Nicotine is the main addictive substance in cigarettes and other forms of tobacco. Nicotine is a drug that affects many parts of your body, including your brain. ... That's what leads to addiction. When people don't smoke, they may have withdrawal symptoms.
Nicotine is the main addictive substance in cigarettes and other forms of tobacco. Nicotine is a drug that affects many parts of your body, including your brain. Over time, your body and brain get used to having nicotine in them. About 80–90% of people who smoke regularly are addicted to nicotine.
The evidence about smoking and longevity is pretty definitive: those who don't smoke tend to live significantly longer. In our calculator, you'll often see life expectancy results that differ by 10 years or more between a non-smoker and a heavy smoker. The numbers are striking.
The minimum age was raised from 16 to 18 in 1987. It is illegal for minors to be in possession of tobacco, to smoke in public or to purchase tobacco products. It is illegal to sell or distribute tobacco to anyone under the age of 18 years. ... Minors may not purchase or possess tobacco products.