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Read this for context: A new study by researchers at the Uni...

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Read this for context: A new study by researchers at the University of British Columbia and the University of Victoria has shown that common levels of traffic pollution can impair human brain function in only a matter of hours. The peer-reviewed findings, published in the journal Environmental Health, show that just two hours of exposure to diesel exhaust causes a decrease in the brain's functional connectivity - a measure of how The study provides the first evidence in humans, from a controlled experiment, of altered brain network connectivity induced by air pollution. "For many decades, scientists thought the brain may be protected from the harmful effects of air pollution," said senior study author Dr. Chris Carlsten, professor and head of respiratory medicine and the Canada Research Chair in occupational and environmental lung disease at UBC. "This study, which is the first of its kind in the world, provides fresh evidence supporting a connection between air pollution and cognition." For the study, the researchers briefly exposed 25 healthy adults to diesel exhaust and filtered air at different times in a laboratory setting. Brain activity was measured before and after each exposure using functional magnetic resonance imaging (fMRI). The researchers analyzed changes in the brain's default mode network (DMN), a set of inter-connected brain regions that play an important role in memory and internal thought. The fMRI revealed that participants had decreased functional connectivity in widespread regions of the DMN after exposure to diesel exhaust, compared to filtered air. Notably, the changes in the brain were temporary and participants' connectivity returned to normal after the exposure. Dr. Carlsten speculated that the effects could be long lasting where exposure is continuous. He said that people should be mindful of the air they're breathing and take appropriate steps to minimize their exposure to potentially harmful air pollutants like car exhaust. Your task is to: For which of the following U.S./North American organizations might a study correlating diesel exhaust exposure to cognitive and memory impairment in human subjects be of the highest critical importance?: 1.) The Occupational Health & Safety Administration (OSHA), 2.) the International Brotherhood of Teamsters, 3.) the Agency for Toxic Substances & Disease Registry (ATSDR), or, 4.) the Environmental Protection Agency (EPA)? Provide at least two supporting arguments for your choice(s).

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