Garis besar topik
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In 2019, World Health Organization (WHO) has considered air pollution as “the greatest environmental risk to health”. Urban air pollution refers to the air pollution in and around cities. Denser populations experience more urban air pollution. Air pollution affects human health as well as the climate of an area. According to World Health Organization (WHO) 4.2 million deaths every year occur as a result of exposure to ambient (outdoor) air pollution. Although there are some natural sources of urban air pollution, most of the sources are anthropogenic and largely depend on the activities of people.