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Riga Technical University (RTU) has created a moss display using decommissioned solar panels in Viesturdarzs, Riga, aimed at improving air quality by filtering fine particulate matter PM2.5. The moss surfaces attract dust particles, while the solar panels provide a reusable support structure.

Integrated sensors measure dust levels, facilitating ongoing analysis by RTU scientists. The initiative, funded by the European Union Recovery and Resilience Facility, involves collaboration with KTH Royal Institute of Technology, the French National Centre for Scientific Research, and local partners. This project showcases the potential of innovative solutions within a circular economy framework.