Particulate matter (PM-10) refers to a mixture of tiny solid and liquid particles suspended in the air, including dust, soot, and other solid materials with diameters generally 10 micrometers or smaller. Common sources of PM-10 include burning diesel fuels, incineration of waste, agricultural activities like mixing and applying fertilizers and pesticides, road construction, steel production, mining, field burning, forest fires, as well as emissions from fireplaces and wood stoves. Due to their small size, PM-10 particles can be inhaled deeply into the lungs, causing irritation of the eyes, nose, throat, and respiratory issues. These particles vary in composition and size and can originate directly from emissions or form in the atmosphere through chemical reactions involving pollutants like sulfur dioxide and nitrogen oxides. Because PM-10 includes particles small enough to penetrate the respiratory system, they present significant health concerns, especially affecting vulnerable populations.
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