RecruitingClinical trialHousing, Environment, And Living Conditions for Transformed HealthThis project will compare the health effects of public housing renovation, neighborhood built and social environment improvements, and indoor air purification, alone and in combination, as well as the cost effectiveness of each approach. STUDY 1: The study will assess the effects of public housing and neighborhood environment (built and social) improvements on health-related behaviors, psychosocial and physiologic stress, and self-reported and physiological markers of lung health and chronic disease. STUDY 2: The study will determine whether indoor air purification can positively impact lung health in public housing sites not undergoing housing renovation, comparing a site near industrial pollution vs one less contaminated.