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Higher Levels of Air Pollution Associated With Death Rates Among People Older Than 65

by Julia Samuel on June 5, 2015 at 11:34 AM
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Higher Levels of Air Pollution Associated With Death Rates Among People Older Than 65

Every time public health experts propose tighter pollution rules, power plant operators and their republican allies may protest. But a new study shows that tiny dust particles are harmful to human health at concentrations far below the current standards.

Harvard researchers have found a clear link between higher levels of pollution and death rates among people older than 65. They analyzed health data from everyone covered by Medicare in New England - 2.4 million people - between 2003 and 2008 and followed them each year until they died.

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They found that both short and long-term PM2.5 exposure was significantly associated with higher death rates, even when restricted to zip codes and times with annual exposures below Environmental Protection Agency standards.

"Particulate air pollution is like lead pollution, there is no evidence of a safe threshold even at levels far below current standards, including in the rural areas we investigated," said Senior author Joel Schwartz, Professor of environmental epidemiology. "We need to focus on strategies that lower exposure everywhere and all the time, and not just in locations or on days with high particulate levels," said Schwartz.
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The study, conducted by scientists with the Harvard T.H. Chan School of Public Health, is the first to examine the effect of soot particles in the air in the entire population of a region, including rural areas.

"This study shows that we need to go after coal plants that still aren't using scrubbers to clean their emissions, as well as other sources of particles like traffic and wood smoke."

The broad regional scope of the study enabled the scientists to evaluate the effects of fine particulate pollution far from monitoring stations, and to look at the effects of short-term exposures and annual average exposures simultaneously.

Source: Medindia
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