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Air quality sensors on the top of buildings in the city.
Emily T6
Emily T6 Updated: May 09, 2013
Air quality sensors on the top of buildings in the city.

I've seen these sensors...

Often 0
Occasionally 2
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Never 12
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Similar Photos: GPS Pigeons Monitor Air Quality<br/>http://www.gpsreview<wbr/><span class="wbr"></span>.net/pigeonblog-gps-<wbr/><span class="wbr"></span>pigeons-monitor-air-<wbr/><span class="wbr"></span>quality/ the most popular taxi app in China. In this case both driver and client's smartphone act as a sensors exchanging information to eachother. not a sensor, but this app significantly improves the quality of life. You can plan your trip using every possible transport.

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