clasification of suspended particles and health effect

Suspended particles, also known as particulate matter (PM), can be classified based on their size and origin.

1. Size:

   • PM10: These are particles with a diameter of 10 micrometers or less. They can be inhaled into the throat and lungs and can cause health problems such as aggravated asthma, decreased lung function, and respiratory symptoms.
   • PM2.5: These are fine particles with a diameter of 2.5 micrometers or less. They can penetrate deep into the lungs and into the bloodstream, causing serious health problems such as heart attacks, respiratory disease, and premature death.

2. Origin:

   • Primary particles: These are emitted directly from a source, such as construction sites, unpaved roads, fields, smokestacks, or fires.
   • Secondary particles: These are formed in complicated reactions in the atmosphere of chemicals such as sulfur dioxides and nitrogen oxides, which are pollutants emitted from power plants, industries, and automobiles.

Health Effects: Exposure to these particles can have various health effects. Short-term effects include irritation in the eyes, nose, and throat, coughing, chest tightness, and shortness of breath. Long-term exposure can lead to more serious health problems like respiratory diseases (asthma, chronic bronchitis, lung cancer), heart disease, and can even cause premature death. Particularly at risk are individuals with existing heart or lung disease, elderly people, and children.

It's important to note that these particles also contribute to the pollution of our environment, affecting not just human health but also the health of our planet.