Source: Jolie Lee, USA Today

By year's end, Chicago could have as many as 50 sensors attached to downtown light poles collecting data on everything from the humidity to air quality to the noise level.

The project, called "Array of Things," has the potential for far-reaching applications. For example, air quality data could help you navigate a route through the city that avoids pollution and allergens. Or traffic data could inform the city where best to install bike lines.

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