Air pollution is not an excuse to skip your daily exercise. Researchers claim that the polluted air you may breathe in while exercising outside is not enough of a concern to deter from the benefits of exercise. “The researchers used computer simulations to compare data on different kinds of physical activity and different levels of air pollution in locations around the world. It found that for an average air pollution concentration in an urban area, the tipping point – when the risks begin to outweigh the benefits – comes after a huge seven hours of cycling or 16 hours of walking a day.” Researchers emphasized that efforts to reduce pollution should not stop.