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Turning smartphones into personal, real-time pollution monitors

By R&D Editors | February 20, 2015

Mobile technology can help pinpoint when and where children are exposed to air pollution. Image: American Chemical SocietyAs urban residents know, air quality is a big deal. When local pollution levels go up, the associated health risks also increase, especially for children and seniors. But air pollution varies widely over the course of a day and by location, even within the same city. Now scientists, reporting in Environmental Science & Technology, have used smartphone and sensing technology to better pinpoint where and when pollution is at its worst.

Mark J. Nieuwenhuijsen and colleagues note that many studies have investigated people’s exposure to air pollution, which is associated with respiratory and cardiovascular problems. But they usually create a picture of exposure based on air pollution levels outside people’s homes. This approach ignores big differences in air quality in school and work environments. It also ignores spikes in pollution that happen over the course of the day such as during rush hour. Nieuwenhuijsen’s team wanted to test technology’s ability to fill in these gaps.

The researchers equipped more than 50 school children with smartphones that could track their location and physical activity. The children also received sensors that continuously measured the ambient levels of black carbon, a component of soot.  Although most children spent less than 4% of their day traveling to and from school, commuting contributed to 13% of their total potential black carbon exposure. The researchers conclude that mobile technologies could contribute valuable new insights into air pollution exposure.

Source: NIST

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