A person feels giddy in a overcrowded ,poorly ventilated room.Explain
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this happens because in a overcrowded room there is a disrupt between the balance of O2 and CO2. oxygen gets used up and only CO2 is left so a person is unable to breathe and feels giddy
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Lack of airflow working in hot poorly ventilated confined areas. These infect droplets inhaled by healthy person who can become infected. Due to infected droplet keeps circulating in slosed or poorly ventilated areas. Therefore more and more people becomes infected
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