Air pollution is caused by natural sources and human activities and is defined as the presence of substances in the atmosphere that can harm living things or property. It can be caused by physical disturbances like noise or radiation, or by substances that enter the body through respiration. Air pollution can have direct local impacts or affect larger regional and global scales, and different types of pollutants can penetrate the body to varying degrees depending on their size and form.

1. Air pollution is the presence of one or more physical substance , chemistry , or biology in the
atmosphere in a quantity that can harm humans , animals , and plants , to disturb æsthetics
and comfort , or destructive to property . Air pollution could be caused by natural or sources
of human activities . A physical disturbance such as definitions some pollution sound , heat ,
radiation or pollution light is regarded as air pollution . The nature of air pollution resulting in
the impact can be direct and local , regional , as well as global scale . A substance contained
in the air pollutants can enter into the body through the respiratory system . A contaminant
away penetration into the body depends on the kind of pollution . Particulate undersized
besar can be stuck in the upper respiratory tract , while the particulates undersized small
and gas can reach the lungs . Of the lungs , a contaminant absorbed olehsistem circulatory
and spread throughout the body .