National Academies news: Report on EPA's particulate matter research

WASHINGTON -- Particulate matter research conducted by the U.S. Environmental Protection Agency and other scientists in recent years has led to a better understanding of the health effects caused by the tiny airborne particles, says a new report from the National Academies' National Research Council. However, the committee that wrote the report said that even as EPA implements strategies to control particulate matter in the near term, it should -- in concert with other agencies -- continue research in order to reduce uncertainties further and inform long-term decisions.

EPA should sponsor research to determine which chemical components and other characteristics of particulate matter are the most hazardous -- especially when mixed with other airborne pollutants -- and which population groups are the most susceptible, the report says. Research is also needed to better characterize and track particles from various emission sources. The government's continued support and enhancement of particulate matter research would "undoubtedly yield substantial benefits for years to come," the report concludes.

"Much has been learned in the last five years, and the evidence gained is already being used by decision-makers," said committee chair Jonathan Samet, professor and chair, department of epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore. "We need to continue to invest in developing an even greater understanding to take full advantage of the work already done, and to complete the foundation of evidence needed to protect public health. The emphasis now should shift from studying whether particulate matter causes adverse health effects to studying the dose at which those effects are likely to occur. We also need to know which aspects of particulate matter are most hazardous, and to learn how people are exposed to hazardous particles and how these particles trigger injury."

Particulate matter consists of d

Contact: William Kearney
The National Academies

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