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The quality of air has a big impact on human’s health and well-being. Our air quality meters/tools can track the current air quality with no doubt. Pure air usually consists of 21% Oxygen, 78% Nitrogen, less than 1% of Argon, minor Carbon Dioxide & other gases, as well as vary amount of water vapor. Air pollutants including Carbon Monoxide, Volatile organic compounds, Nitrogen Dioxide, and fine or coarse dust particles may almost lead to respiratory problems such as Asthma and Bronchitis, or cause of cancer at worst. These pollutants are commonly found from the exhaust of motor vehicles, fossil fuel power station, controlled or wood burning, and windblown dust.