Exhaust particulate matter, SEM

Exhaust particulate matter, SEM

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Caption: Exhaust particulate matter. Coloured scanning electron micrograph (SEM) of particulate matter (PM) collected from the exhaust of a car. These are grains of unburnt fuel and partially burnt soot caused by the incomplete combustion of the fuel in the car's engine. Motor vehicles are a major source of atmospheric pollutants. Exposure to pollutants from vehicle exhausts can cause respiratory conditions, such as asthma, and lung cancer. Magnification: x8000 when printed at 10 centimetres wide.

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Keywords: aerosol, air pollution, asthma, atmospheric, car engine, carcinogen, carcinogenic, coloured, crystal, environment, environmental, environmental science, exhaust, false-coloured, grain, grains, incomplete combustion, lung cancer, motor vehicle, particle, particles, particulate, particulate matter, particulates, pm, pollution, scanning electron micrograph, scanning electron microscope, sem, unburnt fuel

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