Low-income housing residents who live in “green” buildings that are built with eco-friendly materials and energy-efficient features appear to have fewer “sick building” symptoms (SBS) than residents of traditionally constructed low-income housing, according to a new study led by researchers at Harvard T.H. Chan School of Public Health. Asthma outcomes—hospitalizations, attacks, and missed school days due to asthma—were also significantly lower for children living in the green buildings.

The study will be published online Oct. 15 in the American Journal of Public Health.

“Green design incorporates many aspects that could reduce environmental exposures and improve health, such as the removal of pollution sources and the addition of exhaust ventilation,” said lead author Meryl Colton, a researcher at Harvard Chan School when the study was done and now a medical student at the University of Colorado. “Our study is unique in that it is the first green housing study large enough to examine changes in some important outcomes such as children’s asthma attacks and hospital visits.”

The Harvard Chan researchers worked in collaboration with the Boston Housing Authority to gather data from residents in three BHA developments in 2012 and 2013. They completed surveys with more than 200 residents and conducted more than 400 home inspections, and returned for follow-up surveys and visits approximately one year after the initial interaction. Half of the housing units included in the study had been built using green building standards and policies and the other half were conventionally constructed.

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