Smoke is a collection of airborne solid and liquid particulates and gases emitted when a material undergoes combustion or pyrolysis, together with the quantity of air that is entrained or otherwise mixed into the mass. It is commonly an unwanted by-product of fires (including stoves, candles, oil lamps, and fireplaces), but may also be used for pest control (fumigation), communication (smoke signals), defensive and offensive capabilities in the military (smoke screen), cooking, or smoking (tobacco, cannabis, etc.).
Smoke consists of a complex mixture of compounds, including:
Inhaling smoke can have serious health effects, as it can irritate the respiratory system, cause breathing difficulties, and contribute to various respiratory and cardiovascular conditions. Prolonged exposure to smoke can be particularly harmful.
Smoke can also have a significant impact on the environment, contributing to air pollution and affecting air quality. Particulate matter and various chemicals in smoke can have detrimental effects on ecosystems and contribute to climate change.
To understand smoke and its properties, it's important to study the following topics:
By studying these key areas, you can gain a comprehensive understanding of smoke and its significance in chemistry, health, and the environment.