Currently, pollution is a common problem all over the world. The most common is air pollution. Many dangerous chemical and biological agents are involved in the contamination of outdoor and indoor air which leads to air pollution. Major causes of air pollution are industrial smoke, household combustion devices, vehicles, forest fires, etc. These sources release pollutants like carbon monoxide, nitrogen dioxide, and sulfur dioxide which are hazards to human health causing various airborne diseases like asthma, lung diseases, pulmonary diseases, respiratory infections, etc.

Air pollution is not only spread by human-made sources but also natural sources can be a source of air pollution. When exposed to irritants present in the contaminated air, different airborne diseases occur. Respiratory diseases include asthma, emphysema, etc. Different cardiovascular diseases are also caused by air pollution. Such diseases are the major cause of increasing mortality rates globally.

To avoid such diseases and to breathe in purified air, air purifiers have been introduced. No doubt, air purifiers are playing a major role in purifying indoor air to a great extent.

Household combustion devices emit smoke that contains allergens for asthmatic patients and they find difficulty in breathing. Air purifiers help to remove those contaminants and improve the quality of indoor air. Dust, pollen, spores, and other microorganisms that cause allergies can be easily removed by using air purifiers.

Air purifiers contain many properties that help in purifying the air. HEPA filters are employed in some air purifiers because they can remove very small pollutants that cannot be seen with the naked eye. However, there are air purifiers that use a carbon filter containing activated carbon that can remove bad odors from the air. Therefore, air purifiers must be used to improve the quality of air and to reduce the chances of getting airborne diseases.