There have been a flurry of stories lately about Olympic athletes' concerns over the air quality in Beijing. There has even been talk of athletes pulling out in fear that the pollution could do enough harm to damage their careers.
One of those athletes is Haile Gebrselassie, a superstar in distance running. Haile's manager has told press that Haile may withdraw from the Olympic marathon for fear that it may cut his career short. Indeed, marathon athletes are one of the groups at most risk because their event lasts so long. Haile is also known to have asthma, further justifying his concerns.