What unit is air pollution measured in?
Air quality is measured with the Air Quality Index, or AQI. The AQI works like a thermometer that runs from 0 to 500 degrees. However, instead of showing changes in the temperature, the AQI is a way of showing changes in the amount of pollution in the air. Air quality is a measure of how clean or polluted the air is.
What is exposure in air pollution?
Abstract. Air pollution exposure is a well-established risk factor for several adverse respiratory outcomes, including airways diseases and lung cancer. Few studies have investigated the relationship between air pollution and interstitial lung disease (ILD) despite many forms of ILD arising from environmental exposures …
What is PM 2.5 air pollution?
Fine particulate matter (PM2.5) is an air pollutant that is a concern for people’s health when levels in air are high. PM2.5 are tiny particles in the air that reduce visibility and cause the air to appear hazy when levels are elevated.
How is PM 2.5 measured?
The most common measurements are PM 2.5 and PM 10, measured in micrograms per cubic meter. PM 2.5 is the concentration of microscopic particles less than 2.5 microns in diameter. PM 10 refers to the concentration of particles less than 10 microns in diameter.
What is the AQI scale?
The AQI tells the public how clean or polluted the air is and how to avoid potential associated health effects. The AQI uses a normalized scale from 0 to 500. The higher the AQI value, the greater the level of pollution and the greater the health concern.
What does UG m3 mean?
Term. The concentration of an air pollutant (eg. ozone) is given in micrograms (one-millionth of a gram) per cubic meter air or µg/m3.
Who is AQI standard?
Types of Air Pollutants
| Air Quality Index (AQI) Values | Levels of Health Concern | Colors |
|---|---|---|
| When the AQI is in this range: | ..air quality conditions are: | …as symbolized by this color: |
| 0-50 | Good | Green |
| 51-100 | Moderate | Yellow |
| 101-150 | Unhealthy for Sensitive Groups | Orange |
Which is worse PM10 or PM2 5?
PM2. 5 is more likely to travel into and deposit on the surface of the deeper parts of the lung, while PM10 is more likely to deposit on the surfaces of the larger airways of the upper region of the lung. Particles deposited on the lung surface can induce tissue damage, and lung inflammation.
Why is PM10 harmful?
PM10 particles are so small that they effectively act as a gas. Exposure to high concentrations of PM10 can result in a number of health impacts ranging from coughing and wheezing to asthma attacks and bronchitis to high blood pressure, heart attack, strokes and premature death.