It is more concentrated near busy roads and intersections. Carbon monoxide levels are higher in winter because of stagnant air conditions. Reduces oxygen levels reaching the brain, heart, and other tissues by obstructing the work of red blood cells. This may cause reduced alertness and decreased ability to perform basic tasks. May increase the risk of heart disease and cause chest pain in individuals with coronary heart disease.
Air pollution is particularly harmful to young children and the elderly.
People with coronary artery diseases, anemia, and abnormal hemoglobin are at greater risk from the effects of carbon monoxide. Ozone may affect outdoor exercisers by causing permanent damage to lung tissue and reduced resistance to infections. Ozone is also harmful to those suffering from asthma, emphysema, chronic bronchitis, or previous lung infections. Smokers and those exposed to second-hand tobacco smoke are more susceptible to the harmful effects of air pollution. Even doing this once a week will help.