Small, portable sensors allow users to monitor exposure to pollution on their smart phones

Computer scientists have built a small fleet of portable pollution sensors that allow users to monitor air quality in real time on their smart phones. The sensors could be particularly useful to people suffering from chronic conditions, such as asthma, who need to avoid exposure to pollutants. CitiSense is the only air-quality monitoring system that delivers real-time data to users' cell phones and home computers -- at any time.

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