What must be installed to effectively minimize indoor air pollution?

To effectively minimize indoor air pollution, mechanical ventilation is essential because it mechanically introduces fresh outdoor air into a building while simultaneously exhausting stale indoor air. This process helps to dilute indoor pollutants and ensures a consistent exchange of air, which reduces the concentration of harmful contaminants.

Mechanical ventilation systems can be equipped with filters that capture particulates and other pollutants, thereby enhancing air quality. These systems can also control humidity and temperature, contributing to a more comfortable and healthier indoor environment.

While air filtering plants can aid in producing clean air and open windows can provide some natural ventilation, they are not always practical or sufficient on their own. Sealing all windows and doors may prevent outdoor pollutants from entering but could also trap stale air indoors if ventilation isn't provided, leading to higher pollution levels inside. Thus, mechanical ventilation stands out as the most effective solution.