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 * U.S. Environmental Protection Agency's Air Sensor Toolbox: <https://www.epa.gov/air-sensor-toolbox>
 * AQICN provides open Air Quality Index data: <https://aqicn.org/map/world> 
 * Open-source daily fine particulate matter (PM2.5) datasets at a 10 km resolution for India from 2005 to 2023 \[non-peer-reviewed]: https://doi.org/10.5281/zenodo.10807119
-* OpenAir R package: https://bookdown.org/david_carslaw/openair/
+* OpenAir R package for data analysis and visualization: https://bookdown.org/david_carslaw/openair/
 * Some private air sensor firms share air quality data with the public. Check the air sensor firm’s website for what is available and their conditions.
 
 **Resources for Developing an Air Sensor Project**