Tobacco smoke particles on filter fibre, SEM

Tobacco smoke particles on filter fibre, SEM

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Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Tobacco smoke particles on the surface of a cigarette filter fibre, coloured scanning electron micrograph (SEM).The pollutants generated by the cigarette arise from the chemical process of burning organic matter or the combustion of tobacco and paper. Tobacco smoke particulate matter consists of millions of tiny particles of diverse chemical composition. Particulate matter from tobacco smoke includes many small particulates of different size that reflect light (tobacco smoke is easily seen by the naked eye). Gases are also emitted by the cigarette such as benzene and carbon monoxide. Particles smaller than 2.5 micrometres are major components of cigarette smoke and can enter deep into the lung where they can cause serious health problems, including cancer. Magnification: x575 when shortest axis printed at 25 millimetres.

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