Effects of pollutants on human health

Index Page | MEDINET HomePage | Bangladesh Arsenic Page | Next Page

Carbon di-oxide (CO₂): It is a major absorber of infrared radiation emitted towards the space from the earth surface. Thus, it has crucial role in planetary temperature structure.

Carbon monoxide (CO): If inhaled, it is absorbed from the lung alveoli 300 times faster than oxygen. High concentration of CO in blood makes it difficult for heart to pump blood through arteries.

Hydrocarbons (HC): Unburnt hydrocarbon may form ozone with oxides of nitrogen which is a central nervous system depressant. Other hydrocarbons cause convulsion of CNS.

Oxides of nitrogen (NO_x): Causes dilatation of air spaces in lungs. NO₂ causes damages to bronchioles and alveolar ducts. NO₂ is also suspected to impair the defense mechanism of respiratory system. Infants and children are more susceptible.

Particulate matter: Diesel emits suspended particulate matter (SPM) which contains shoot. Shoot is responsible for reduction of atmospheric visibility and absorb and carry organic compound to lungs.

Lead (Pb): Around 75% of the ingested lead is deposited in bones and tissues causing irreversible brain and kidney damage. Growing nervous system of young children are particularly vulnerable.

Source: Effect on Dhaka air quality by 2-strokes engines and suggested remedies. Paper presented by Uttara Motors Ltd. at a Consultative Meeting on integrated approach to vehicular pollution control held bewteen April 26-27, 1998 in Dhaka.

----------------

Reference:

1. Effect on Dhaka air quality by two strokes engines and suggested remedies. Paper presented by Uttara Motors Ltd. in a Consultative Meeting on Integrated Approach to Vehicular Pollution Control held during April 26-27, 1998 in Dhaka.

Index Page | MEDINET HomePage | Bangladesh Arsenic Page | Next Page

© Medical Information Group (MIG), Dhaka, Bangladesh

November 22, 1998 10:17 PM