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Riga Technical University (RTU) has developed a moss display installed in Viesturdarzs, Riga, utilizing decommissioned solar panels to improve air quality by reducing PM2.5 exposure. The device integrates sensors for real-time dust measurement, aiding ongoing research. The project is supported by the European Union Recovery and Resilience Facility and involves collaboration with partners such as KTH Royal Institute of Technology and SIA 'Rigas Mezi'.