What are air particles?
Air particles are very fine particles consisting of either solid or liquid mass that can remain suspended in the air and spread with the wind. Common examples of such particles are: fog, which consists of small droplets of water; dust that consists of very fine particles of solid matter; And smoke, which consists of solid mass and liquid. The size of the air varies greatly and the microns often measure air particles, which means it is so small that it cannot be seen with the naked eye. Sources of air particles can be natural, such as dust and smoke created by volcanic eruptions and forest fires or man -made, such as soot from coal burning in the power plant or residual oil particles in the exhaust smooth vehicle. Scientific studies show that pollution of particles in the air can cause health problems in humans and affect the climate of the Earth. One micron one millionth meter (39.37 inches). The dust particles in the air often have at least 1 microns in diameter. Air particles that make up fumes can be smallé as 0.1 micrometers, while droplets of water in the fog may vary from 2-50 micrometers. Very small airy particles can remain suspended in the air for years and spread over long distances, while large air particles usually settle on the ground after a short time.
naturally formed air particles account for about 90% of particles suspended in the Earth's atmosphere, and this includes ocean salt of marine spray and dust composed of mineral particles from the Earth's crust. Air particles caused by man can come out of operation, factory emissions, fossil fuel combustion such as oil and many other sources. These particles caused by man vary in composition. Some examples are carbon particles in the exhaust diesel exhaust, metal particles of zerci and sulfur dioxide released from coal combustion. At high concentrations, the sulfur dioxide particles in the air can contribute to the cooling of the Earthclimate.
Air counters can be used to measure particle content in indoor and outdoor air. Such tools commonly detect particles with a diameter of 0.2-25 microns. Scientists believe that air particles with a diameter of less than 2.5 microns can be particularly harmful to humans. Small particle size means that they can penetrate deep into the lung tissue or even into the bloodstream, causing serious lungs and heart disease.