According to the SCMP today 7 million people died as a direct result of air pollution in 2012 , most of those in China and India both places with disgusting air quality
Companies in China are having to pay more to expats who are choosing to leave their families at home and commute . Some are taking it in the form of salary others more time off and free commuting tickets .
So as to your question yes it is harming your health in a big way probably more than you realize , we will all pay the price in our later years