Question

what are the causes of asthma

Answer 1

Exposure to various irritants and substances that trigger allergies(allergens) can trigger signs and symptoms of asthma. Asthma triggers are different from person to person and can include: Airborne substances, such as pollen, dust mites, mold spores, pet dander or particles of cockroach waste.. it is causes of asthama....?....
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Answer 2

the main cause of the disease asthma is air pollution........the SPM plays a vital role as the cause of the disease.....SPM--- SUSPENDED PARTICULAR MATTER....