RIERA is specifically aware of ecological issues. Thus, it is no surprise that the company has constructed several waste treatment plants, both in Spain (Planta de Tractament de Brossa del Maresme in Mataró or the Plant in Gavá-Viladecans) and in Switzerland (Chatel Saint Denis Fribourg). They are all equipped with state-of-the-art technology in recycling, incineration and energy recuperation. RIERA's experience in this sector has made it one of the current leaders in the Spanish market.