do you want to know the Air Quality Index of a city? This is the app you need. Just type a city you want to know the air quality, and press the check button. You will see the quality of the air of the city. An air quality index (AQI) is used by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become. Public health risks increase as the AQI rises. Different countries have their own air quality indices, corresponding to different national air quality standards. Some of these are the Air Quality Health Index (Canada), the Air Pollution Index (Malaysia), and the Pollutant Standards Index (Singapore).
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4Free Oxygen Measure Free
4Free Oxygen Measure could measure your SpO2,blood oxygen without any peripheral