An Advisory panel to the Government, made up of medical experts has set the objectives based on the health effects of each pollutant in relation to exposure over a period of time. Nitrogen Dioxide High exposures can effect the way in which the lungs and airways function. It can also increase the risk of respiratory problems and reactivity to natural allergens. At the levels measured in the UK, there is no evidence of effects on people in good health. Very small particles can worsen heart and breathing problems in sensitive groups, e.g. those with asthma.
Effects can range from days of restricted activity to early death.
Benzene and 1,3 Butadiene Benzene and 1,3 Butadiene are carncinogens. The risk is related to overall lifetime exposures. At the levels stated by the Government's Expert Medical Advisory Panel, the risk to health is very low. Carbon Monoxide This can have an effect on mental activity and can worsen existing problems that affect the delivery of oxygen to the heart and lungs. Lead Lead can affect many different parts of the body, including the production of blood, the nervous system and mental functioning.