Sustainable urban development emphasizes the importance of using __________ materials, which are sourced locally and have a reduced environmental impact compared to traditional materials.

Sustainable urban development stresses the use of eco‑friendly materials. These materials come from local sources, so they travel less and cut down on pollution from transport. Because they are made from renewable or recycled resources, they leave a smaller carbon footprint than many traditional building materials. For example, a city might use locally quarried stone or recycled concrete blocks instead of importing steel, saving energy and supporting the local economy. This approach keeps the environment healthier while still meeting building needs.