See an excerpt below from the news story reported in HealthDay via Yahoo News:
City Cycling Seems to Have More Upsides Than Down
Sun Jul 4, 11:47 pm ET
"The study found that cycling even for a short period of time in traffic can lead to significant exposure to components of car exhaust, such as tiny particles and soot, that may contribute to respiratory and heart problems. Because cyclists tend to breathe about twice as deeply as car drivers, they inhale larger amounts of air pollutants.
The researchers also calculated the risk of dying in a traffic accident as about four times greater per half-mile traveled for cyclists than for car drivers.But they determined that the health benefits for cyclists in The Netherlands were at least nine times greater than the hazards. By switching from driving to cycling, people would, on average, live three to 14 months longer because of increased physical activity. The risks they would face would be potentially losing 0.8 to 40 days of life because of increased exposure to air pollution and an average of five to nine days from a fatal traffic accident."
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