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Scientists working near busy roads increase the risk of breast cancer. After discovering at least six women from the same place, they contracted the disease in three years, warn scientists.
A group of women was diagnosed with cancer, probably due to car exhaust smoke, which prompted scientists to describe this disease as a "new occupational disease". Another group of seven women contracted the disease after working in a tunnel a few kilometers from the Canada-US border.
The study focused on the case of an unnamed woman who worked for 20 years at the Ambassador Bridge between Detroit and Michigan Windsor, Ontario.
The bridge connects the United States and Canada, one of the busiest trade borders in North America, with 12,000 trucks and 15,000 cars a day.
Assuming the volume of traffic is similar over the 20 years that women have worked 40 hours a week, they have been exposed to 46.8 million vehicles.
Doctors Michael Gilbertson and Jim Proffy of Stirling University in Scotland believe that the chemicals in the smoke of the road are at the root of cancer.
The study found that women working in traffic kiosks gave them a 16-fold higher risk of breast cancer than women.
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