Portable sensors allow users to check air pollution ...News Direct
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The device, named CitiSense, is able to measure local concentrations of ozone, nitrogen dioxide, and carbon monoxide, the pollutants emitted most by internal combustion engines. The data is wirelessly sent to the user's smartphone and displayed using an app, where an actual number rating is given as well as the EPA's color code scale, where green is good and purple is not.
Tests of CitiSense showed that people who waited for the bus or cycled along a given route were exposed to a higher level of air pollutants compared to people who drove the same route. They also found that air pollution is worse in certain highly-localized areas rather than evenly diluted in the air. Researchers hope that data collected from a multitude of sensors throughout an area will be able to provide a more detailed and accurate air quality reading than is currently possible.
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