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Airborne particulate matter (PM) is a combination of numerous chemical species rather than a single pollutant. It is a complicated mixture of solids and aerosols made up of solid cores coated in liquid, minute liquid droplets, and dry solid fragments. They can vary greatly in size, shape, and chemical makeup. When breathed into the lungs, particles having a diameter of 10 microns or smaller (known as PM10) can have a negative impact on health. Particles with a diameter of no more than 2.5 microns are referred to as fine particulate matter (PM2.5). Consequently, part of PM10 is contained in PM2.5. Particulate matter (PM) exposure is linked to detrimental health effects. The topic of whether certain PM mixture components provide a bigger risk to the public's health than others has long existed to regulate the sources that release the more hazardous ones. To determine whether certain PM sources and constituents may be more hazardous than others, this study outlines an extensive epidemiologic and toxicologic research program. To safeguard public health, regulatory bodies must consider this question when establishing air quality guidelines. The findings indicate that while other factors and sources could not be completely ruled out, PM from traffic sources, the combustion of coal and oil, and other sources was linked to unfavourable health effects. Thus, based on what is now known, establishing air quality criteria for PM mass overall is probably still a good way to safeguard public health.
Rajpoot et al. (Thu,) studied this question.