Many factors can cause indoor air quality to decline. In addition to indoor materials and pollution sources, forest fires, industrial exhaust and traffic exhaust and other factors may cause indoor pollution. These pollutants may include PM2.5, volatile organic compounds, sulfur dioxide, nitrogen dioxide, carbon monoxide and so on. These substances may have serious effects on the health of pregnant women and the elderly.

Pregnant women

Pregnant women inhale too much inhalable particles (PM2.5) and ultrafine particles (PM1.0) will affect fetal health, may cause premature birth and low birth weight children and other problems. At the same time, long-term exposure to polluted environments will also increase the risk of pregnancy complications.

Elderly people

The elderly’s physical function declines, immunity is weak, more susceptible to air pollution. Long-term exposure to harmful gases can cause allergies, chronic obstructive pulmonary disease, asthma, cardiovascular disease and other health problems.