BBC Health reports that a study from the University of Birmingham has found that children living near to major traffic hubs are more likely to die of cancer. The study found that living near to bus stations, train stations and hospitals increased the incidence of childhood cancer. The research found that carbon monoxide and 1,3-butadiene, both found in exhaust, especially diesel exhaust were responsible for the increased incidence of cancer. 
This is the second time that BBC Health has reported that exhaust fumes can cause increased risk of cancers. Child Cancers 'Linked to Pollution' stated that "Children born near emission "hotspots" were more likely to die of cancer before their 16th birthday than others".
The Healthy House is very aware that the quality of the air that we breathe, both inside and outside the house are very important. For this reason we recommend an approach that takes into account the different places that you are likely to experience the most pollution.
In the home and office
As we spend at least half of our lives in our homes and about a quarter at work it is very important that the air we breathe is clean, but not stale. We recommend the use of and air cleaner. In order to keep the air from getting stale you should air out the room every day. We try to keep the windows open to keep an air flow, but obviously try to avoid adding to the indoor pollution by having the windows open when the level of pollution outside is high, eg during rush hour.

In the Car
In the car you are in an enclosed space, often in a traffic jam where you are exposed to very high volumes of air pollution. Use a car air purifier to remove pollutants.

The best solution to avoiding air pollution when outdoors is to use a mask, but you do have to overcome the embarrassment factor - something I have not managed yet!