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Bridge and Tunnel Workers

One 1988 study of more than 5,000 New York City bridge and tunnel worker found that people who had worked in transportation tunnels had a 35% increased risk of heart-related death compared to the general population.

"It's intuitive," says Mauro Moscucci, MD, chief of the cardiovascular division at the University of Miami Miller School of Medicine. "These workers are exposed to higher levels of carbon monoxide compared to bridge workers."

Studies have shown that exposure to air pollution can increase the risk of both heart attacks and strokes.

(Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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