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is the condition in which air is contaminated by foreign substances. Air pollution consists of gaseous, liquid, or solid substances that, when contained in sufficient concentration, for a sufficient time, and under certain conditions, tend to interfere with human comfort, health or welfare, and cause environmental damage. Pollutants examples include: , CO2 Dust (PM 2.5 , PM 10), VOC, Allergens such as bacteria and virus.
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