# Sustainable development in Porto Alegre metropolitan region > Live situation record from CLSTR: https://clstr.news/situations/sustainable-development-in-porto-alegre-metropolitan-region > Updated: 2026-10-20T17:52:21.000Z. Sources: 4. Developments: 2. The Porto Alegre metropolitan region has seen various developments regarding sustainable urban growth and infrastructure. Cachoeirinha achieved a high ranking in the 2026 Sustainable Development Index for Cities (IDSC-BR), placing second in the Porto Alegre Metropolitan Region among municipalities with 100,000 to 500,000 inhabitants. The city showed particularly strong performance in clean water, sanitation, energy, and climate action. In Porto Alegre, urban revitalization efforts have commenced in the Historic Center, specifically at Praça Otávio Rocha, through a public-private partnership focused on landscaping and the restoration of historic structures. Additionally, the city is testing Italian recycling technology in the Sarandi neighborhood to implement a cold asphalt recycling process, aiming to reduce greenhouse gas emissions and minimize waste during roadwork. ## Timeline ### 2026-10-20: Porto Alegre initiates urban revitalization and sustainable infrastructure projects Porto Alegre is advancing urban development through the revitalization of Praça Otávio Rocha and testing innovative Italian cold asphalt recycling technology to improve sustainability. 2 sources. https://clstr.news/cluster/porto-alegre-initiates-urban-revitalization-and-sustainable-infrastructure-projects ### 2026-09-28: Cachoeirinha ranks second in Porto Alegre metropolitan sustainable development Cachoeirinha ranks as the second best city for sustainable development in the Porto Alegre Metropolitan Region according to the 2026 IDSC-BR index. 2 sources. https://clstr.news/cluster/cachoeirinha-ranks-second-in-porto-alegre-metropolitan-sustainable-development --- Cite as: Sustainable development in Porto Alegre metropolitan region. CLSTR, https://clstr.news/situations/sustainable-development-in-porto-alegre-metropolitan-region