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Here’s a clear English summary following the page order (1 → 5) with all the key ideas: Page 1 – Concept of a Sustainable City A sustainable city is a city that integrates sustainable development into its policies. It considers social, economic, environmental, cultural, and intercultural issues together. Main challenges: Climate change Energy use Waste management Urban transport and mobility Protection of natural resources (water, air, soil) Biodiversity Urban sprawl (peri-urbanization) Social i