The European Environment Agency (EEA) and the European Network of the Heads of Environmental Protection Agencies (EPAs) organised CleanAir@School, a citizen science initiative to monitor air quality. From 2018 to 2020, pupils, teachers and parents who were engaged in the project used simple, low-cost devices to measure nitrogen dioxide (NO2) levels around their schools. The results of the initiative describe how schoolchildren measured pollution levels, learned about air quality, and promoted actions for cleaner air. The initiative also discussed how data collected by citizens might complement official air quality monitoring, in order to communicate and improve understanding of local air quality.
Source: EEA, 1 February 2021