A warming planet makes smog worse; it leads to more frequent and severe wildfires, which release dangerous particulate matter. Any meaningful intervention to improve air quality requires data, but finding accurate air quality data—usable by researchers, community members and policy makers alike—is incredibly difficult. In this episode, Madhuri Karak speaks with Colleen Rosales and Chris Hagerbaumer of OpenAQ about their efforts to harmonize and standardize air quality data.