Subdivided flats are an incredibly common sight in Hong Kong. Over 250,000 people currently live in these homes, which are on average 41 sq ft, below the Housing Authority’s 59 sq ft standard. These subdivided flats amplify indoor air pollution due to its cramped nature and lack of proper ventilation system. People are far more likely to contract airborne diseases and infections due to inadequate ventilation systems. Airborne bacteria is far more common within these flats, promoting the growth of bacterial and fungal colonies. With many of these flats being near areas with high traffic and having no ventilation systems, it’s often that these pollutants are trapped within these flats. Residents often have no other choice but to bear the consequences of this as the supply for housing is low relative to its demand.