A new study finds that greenspace -- the vegetation in a neighborhood's yards, parks and public spaces -- has a positive impact on a key genetic marker associated with exposure to stress. However, the study also finds that the positive impact of greenspace isn't enough to compensate for other environmental challenges, such as air pollution.
The markers in question are telomeres, which are sections of repetitive DNA found at each end of a chromosome that serve to protect the ends of the chromosomes from damage. However, each time a cell divides, the telomeres inside those cells become slightly shorter. Once the telomeres become so short that the cell cannot divide successfully, the cell dies.
For the study, researchers drew on data from the CDC's National Health and Nutrition Examination Survey for the years 1999-2002. NHANES is a longitudinal, nationally representative study that assesses the health of the U.S. population through interviews and physical examinations. "That's the good news," Ogletree says."However, when we accounted for other characteristics of each neighborhood -- air pollution, segregation, or 'deprivation' -- the positive effect of the greenspace essentially disappeared. Deprivation, in this context, was an overarching variable that included the neighborhood-level data on income, education, employment status, and housing conditions.
S. Scott Ogletree, Jing-Huei Huang, David Reif, Lin Yang, Christopher Dunstan, Nnamdi Osakwe, Jae In Oh, J. Aaron Hipp.A new study finds that having a portable air cleaner in the home can reduce the negative impacts of air pollution on brain development in children. Scientists are studying the benefits of using air ...
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