Duke University Study Correlates Ambient Particulate Matter to Alzheimer’s Disease
In a study published July 9, 2021, researchers at Duke University correlated theorized elevated rates of Alzheimer’s disease, non-Alzheimer’s dementia, and Parkinson’s disease to long-term exposure to elevated levels of ambient air particulate matter 2.5 (PM2.5) that exceed the World Health Organization (WHO) air quality standards (≥10μg/m3).
Data obtained through the State Center for Health Statistics and the Healthcare Cost and Utilization Project was evaluated against data from the Global Annual PM2.5 Grids from MODIS/MISR and SeaWiFS. The study group consisted of residents from 87 zip codes in the southern Piedmont area of North Carolina with elevated particulate matter (PM2.5≥10μg/m3). The control group consisted of residents from 81 zip codes in the same region with low levels particulate matter (PM2.5≤7.61μg/m3).
Researchers concluded that North Carolina residents aged 65+ with long-term exposures to ambient PM2.5 levels exceeding the WHO standard had significantly increased risks of death and hospital admissions for Alzheimer’s Disease.
The U.S. EPA signed an amendment to the rule on February 28, 2022 that removes the stay of the formaldehyde limit for lean premix and diffusion flame gas-fired units that were constructed or reconstructed after January 14, 2003.