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Risks to Health posed by Air Pollution

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Environmental Protection

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The sections below summarise the main health conditions that are understood to be affected by air pollution.

Chronic Bronchitis and Emphysema

The major cause of this condition is smoking but there is evidence that atmospheric pollution may also contribute. Since the 1950's there has been evidence showing that these diseases occur more commonly in urban areas. They are also aggravated by smoke, sulphur dioxide and other pollutants. Recent studies have shown that the risk of death amongst such patients is increased as concentrations of air pollution rise.

Cardio and Respiratory Problems

Studies from North America have shown an increase in risk of cardio- respiratory death with increasing particle concentration. The incidence of heart attacks has also been shown in a recent study to increase on days where concentrations of particles are higher. Carbon Monoxide exposure is also related to episodes of heart failure.

Lung and other Cancers

The major cause of lung cancer is smoking which accounts for approx. 90% of lung cancers. Because of this it is difficult to assess the role of pollution.

Asthma and Allergies

There has been an increase of about 50% in the number of cases of asthma in the UK over the last 30years. It has been documented that environmental factors such as air pollution can provoke or aggravate asthma symptoms in those who are already asthmatic. There is also an ongoing debate in the medical profession as to whether air pollution can initiate asthma in previously healthy individuals although there is no clear evidence to demonstrate this.

IMPORTANT NOTE:

The conclusions of nearly all pollution related studies are constantly questioned and therefore are provided here on the basis of current information. New research is ongoing and the validity of all scientific and health links is regularly reviewed.

Health effects of polluted air

Possible Health Effects of Air Pollutants

Pollutant

Effect

Sulphur Dioxide

Can cause respiratory problems

Ozone

An irritant to the eyes and lungs. Will exacerbate asthma and bronchial conditions.

Nitrogen Dioxide

Can cause breathing difficulties particularly to susceptible people.

Particulates (PM10)

Can affect many different parts of the body including production of blood, the nervous system and mental functioning. An irritant.

Benzene

Carcinogen (can cause cancer).

PM10 means particles with a size of 10 microns or less.

Last updated: Mon 18th January, 2010 @ 10:23