Does air pollution cause asthma?
It is not necessary that air pollution will always cause asthma. But surely air pollution increases the chance of inducing asthma attack in people prone to it.
Asthma is a kind of allergy, in which our breathing system over reacts to any allergic substances present in the air we breath.Different persons may be allergic to different substances and even different kind of smells. When an asthmatic person's body mechanism detects presence of such offending substances, the body reacts as if the substance is very harmful and automatically tries to block its entry by contracting the wind pipe. This makes it difficult for the person to breath, and this is the condition we call asthma.
A person may be allergic to something quite harmless to normal persons, for example pollens from flowers that are frequently present in good healthy air also. However, such a person is very likely to be allergic also to pollutants in the air such as dust, smoke, chemical vapours, or any strong and foul smell.
The answer is a no as well as a yes.Air pollution by itself is not desirable to the society,but it may not bother many as far as Asthama is concerned,but certain allergens present in the air can trigger an Asthamatic attack in quite a few people who are sensitive to these allergens.
The severity of Asthamatic attacks depends upon the indivisual's lungs' capacity and the ability to ward of the effect of allergens by practicing regular breathing exercises also presribed medication.
The health effects caused by air pollutants may range from subtle biochemical and physiological changes to difficulty breathing, wheezing, coughing and aggravation of existing respiratory and cardiac conditions. The effects of air pollution can result in increased medication use, increased doctor or emergency room visits, more hospital admissions and even premature death. Air pollution is a problem for everyone - not just people with asthma. High levels of air pollution can be associated with decreased lung function and more frequent reports of respiratory symptoms. This is especially true for people who spend a lot of time outdoors.
Scientists still disagree on whether air pollution is a cause of asthma or not. It is known though, that air pollution does trigger symptoms in asthmatic people.