Exposure to environmental pollution while in the womb might increase a child's risk of cancer, a study suggests.

Children born near emission "hotspots" were more likely to die of cancer before their 16th birthday than others.

Proximity to emissions of 1,3-butadiene and carbon monoxide, which are produced by vehicle exhaust, carried the highest risks.

http://news.bbc.co.uk/2/hi/health/4173831.stm

[The modern life is full of health hazards which could be avoided altogether. Forbidding private cars would only not cut down the emissions, but also promote a positive effect on people's health due to increased physical activity.]