City cycling may save the planet, but not your lungs

A study has found that cycling in congested cities could do more harm than good to your heart and lungs, due to the breathing in of dangerous pollutants in the air.
While pedestrians are exposed as well, cyclists exert themselves more and breathe more heavily, which increases their risk, the Australian reports.
Problem include breathing in exhaust fumes, as well as tiny particles generated by vehicle brakes and tires.
A separate 2011 UK study also found that urban cyclists may be inhaling high levels of black soot.The University of London study found that urbanites who cycled to work had 2.3 times more black carbon in their lungs than pedestrians.
Previous research has shown that black carbon is linked to a wide range of serious health issues, including reduced lung function and a higher risk of respiratory diseases and heart attacks.
What's an avid city cyclist to do ? Consider using a face mask.Also, opt for roads with less traffic, or travel during times of day when there is less congestion, and avoid riding behind diesel powered buses and trucks.