Brief Facts on Air Pollution And Its Types?
It is a pollution as a result of emission into the air, of substances at a rate that exceeds/that surpasses (that) of natural resources to dissolve that emission.
Factors that determine the severity of pollution.
- Plant features e.g. Whereas the congestion of houses, there’s little circulation of air and the areas tend to be stuffy.
- Seasons e.g. There’s more pollution during the day as opposed during the night.
- Prevailing winds
- Precipitation (presence or absence of rainfall)
Types of air pollution
- Aerosols: – Are small solids or liquid particles that are suspended in the air e.g. dust (from suspended particulate matter).
- Smoke e.g. Tobacco smoke, ash (a solid phase of smoke)
Determinants of Aerosols level of Pollution
i.) Size – Determines the speed of the particle and also where the particle will settle. The smaller the particle, the faster it moves and deeper it settles e.g. Lead or mercury particles settle in the respiratory tract as they are slightly larger than soot which may settle in the lungs.
ii.) Shape – The shape of a particle would determine the ease or difficulty of removing the particle by natural process e.g. asbestos – it is long and sharp. It damages the lungs and therefore , one can easily develop cancer of the lungs.
iii.) Composition – Determines what will happen when the particle land e.g chemical reactivity.
iv.) Humidity – Determines the water content of the particle. The lower the humidity, the faster the water evaporates. Some diseases tend to spread faster in the cold season than in the warmer season e.g. Influenza.
- Gases: The effects gases on health are determined by:-
- Solubility in water.
- Chemical reactivity of the gases.
- Inhalation: Inhaled compounds harbour direct entry into the respiratory system than in the circulatory system most rapid entry into the body of toxicants because of the unlimited association of the airways and the circulatory system. The circulation degree and delivered tissue depends on: –
ii.) Duration of exposure
iii.) Solubility in the blood
iv.) Reactivity with other compounds
v.) Respiratory rates