A Particulate Matter (PM) or Particle Pollution is a complex mixture of extremely small particles and liquid droplets that get into the air. A PM is any solid material composed of distinct particles or pieces, regardless of size, shape, or chemical composition suspended in air many of which are hazardous, can affect the heart and lungs, and cause serious health effects. A PM consists of sulphate, nitrates, ammonia, sodium chloride, black carbon, mineral dust, and water. The most health-damaging particles are those with a diameter of 10 microns or less (PM10), especially fine particles of 2.5 microns or less (PM2.5). A PM is generated from human and natural sources, with PM10 and above often coming from dust generated in the environment.
Related Definitions in the Project: The HSE Management
