Our health depends not only on personal hygiene but also on the hygiene of our homes and housing. We spend much of our daily time in our home and our physical and mental development takes place there. This study session describes the basic hygiene requirements of housing to ensure that it is appropriate for our health. Factors affecting housing sanitation and possible interventions will be discussed. We will also closely examine the status and effect of indoor air pollution. You will learn the linkages between our health and environmental needs with respect to housing.