Whats is indoor air quality around us

Indoor air quality (IAQ) is the air quality within your home as it relates to your and your family’s health and comfort.
Indoor pollution sources that release gases or particles into the air are the primary cause of IAQ problems in homes.
Inadequate ventilation can increase indoor pollutant levels by not bringing in enough outdoor air to dilute emissions from indoor sources,
and by not carrying indoor air pollutants out of the home. High temperature and humidity levels can also increase
concentrations of some pollutants. Primary factors that affect IAQ are carbon monoxide, carbon dioxide,
volatile organic compounds, particulates, temperature and humidity.

Use lanjiaparticle counter can test out the value of IAQ.