Update: 2019-11-14 17:19 Source: LUFTMY
Although our breathing air is almost invisible to the naked eye, it is full of tiny particles.Chemicals in the form of liquids, gases or solids, soil, fumes, dust or allergens.When we burn fossil fuels for energy use and production.The release of gases and chemicals will cause air pollution and pose a threat to human health and the whole earth.These small airborne hazards are called particulates or PM.
At any given time, the amount of particles in the air depends on your environment. These particles are released from various sources, both indoor and outdoor. When indoors, PM levels are usually the same or lower than outdoors.
Here are some factors that increase the level of particulate matter floating in the interior space:
3.To burn a candle or fire
4.Use kerosene heater
5.Diffusion essential oil
6.Cleaning with common chemicals
7.Open doors and windows to outdoor polluted environment
8.Use hair spray, aerosol freshener or deodorant
The 2.5 in PM2.5 refers to the size of the pollutant in micrometers. Bear with us here while it gets a bit mathematics-y! Micrometers have this symbol: µm and are equivalent to 0.001 millimeters. The smallest thing that the average human eye can perceive is about 0.1 millimeters, which is around the same width as a human hair. So in order for us to see something as incredibly small as a micrometer, we need to use powerful microscopes. Here’s a diagram from the Environmental Protection Agency to help you visualize the scale of these tiny particles.
Any particles in your breath can worsen your respiratory tract, but experts are especially worried about tiny particles like PM2.5, because they not only penetrate deep into our lungs, but they are so fine that they can even enter our blood.
Depending on your overall health, the long-term and short-term negative health effects of PM2.5 will vary. When exposed to PM2.5 levels in the medium to hazardous range, the following effects may occur:
1.Shortness of breath
2.Inflammation of eyes, nose and throat
3.Excessive coughing and wheezing
4.Pulmonary dysfunction and pulmonary diseases
5.Weakened heart function, sometimes leading to heart attack
PM2.5 will also damage the environment by increasing the acidity of soil and water. This in turn affects their ability to produce food and sustain life.
Pollution levels are usually measured at a scale of 0-500, known as the air quality index or AQI:
Even if the content is moderate, particles may still be harmful to sensitive people. When the level of air pollution is reduced, a person's cardiovascular and respiratory health will be greatly improved both in the long term and in the short term.
The Internet is a treasure trove of real-time data on global air quality, with several websites showing detailed maps of particulate air pollution with a diameter of less than 2.5 microns, consisting of thousands of surfaces. Site measurement from all over the world.
According to the research of word heath, the following is a list of the best and worst air pollution countries in the world in 2017. All units shown in this table represent the level of PM2.5.
Access to the room limits exposure but does not eliminate the risk of inhalation of PM2.5. Do it yourself masks, with removable filters or surgical masks, also won't protect you because they don't have an effective filter for catching particles. The material and technology of respirator make it an effective means to filter PM2.5. If your environment is dangerous, protect your respiratory system from pollutants, viruses and bacteria.