A study conducted by Dr Hyuk Chul Kwon suggests that balding could be caused by air pollution produced by cars and trucks.
The study says that "particulates" pumped out by vehicles are believed to destroy a protein that fuels hair growth. The research was conducted by The Future Science Research Centre in the Republic of Korea, led by Hyuk Chul Kwon.
Study leader Dr Hyuk Chul Kwon told Daily Mail that the results suggest particulate matter may cause hair loss.
"Our research explains the mode of action of air pollutants on human follicle dermal papilla cells, showing how the most common air pollutants lead to hair loss."
Academics who are involved in this research have now suggested people should spend less time exercising outdoors, if they want to avoid hair loss.