"Civic hackers" in Philadelphia have formed a group called Code for Philly that plans to collect air pollution and temperature data from sensors attached to buses throughout the city. The project seeks to use the location data from the sensors along with location data about trees in the city to show how planting trees can have a cooling effect. The group also plans to make all the data it collects free to the public so the information can be repurposed for use in other applications. This coincides with efforts by tech groups in the U.K., which recently used the Environment Agency's flood data to make flood-relief applications for citizens affected by the weather in February.

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