According to WHO the estimated outdoor air pollution causes 4.2
million premature deaths worldwide every year among the general population.
Air pollution is a harmful substance in the air and a major risk to human health.
It can trigger asthma, elevate coughing, decrease lung function, heart attacks,
and stroke.
Air pollution is everywhere; it could be found indoor or outdoor. Outdoor air pollutants are (1) particulate matter – fine particulate matter (PM2.5) and coarse particulate matter (PM10); (2) ozone (O3); nitrogen dioxide (NO2); and (3) sulfur dioxide (SO2).
Air pollution could be natural or created by man that can harm the health of humans, animals, and even plants. Some of the major contributors to air pollution are exhaust from cars, buses, and airplanes. The man-made pollutions such as emissions from factories, cars, planes, or aerosol cans, and cigarette smoke are called anthropogenic sources. It could be acquired from our household and workplaces and most common in large cities.
