Particulate Matter

Special Report 21, Burden of Disease Attributable to Major Air Pollution Sources in India, provides the first comprehensive analysis of the levels of fine particulate matter air pollution in India by source and their impact on health. Household burning emissions (contributing to outdoor air) and coal combustion are the single largest sources of air pollution-related health impact. Emissions from agricultural burning, anthropogenic dusts, transport, other diesel, and brick kilns also contribute significantly.

Research Report 193 describes a novel study by Jiu-Chiuan Chen and colleagues examining possible associations between long-term exposure to ambient particulate matter (PM) and changes in the brains of older women in the United States. The study focused on brain volumes and neurocognitive outcomes, specifically mild cognitive impairment and dementia. Dr. Chen used neuroimaging and cognitive outcome data from women enrolled in the Women’s Health Initiative Memory Study and estimated their exposure to ambient PM_2.5 and to diesel PM.

Research Report 190 describes a study by Frank Gilliland and colleagues that was funded under HEI’s Accountability research program. The investigators collected air quality data and lung function and respiratory symptoms in three cohorts of children who participated in the Children’s Health Study in Southern California. During the 20-year study period, nearly 20 major policy actions were implemented to reduce pollution from transportation and other sources. Gilliland and colleagues evaluated whether the improved air quality was associated with improved lung function and respiratory symptoms in these children.