Slums, home to over 1 billion people worldwide, are the frontline of urban vulnerability. Overcrowding, poor sanitation, unsafe housing, and climate change converge to create daily risks of disease, displacement, and poverty. Open sewage contaminates water, fragile dwellings collapse under floods, and limited healthcare magnifies crises. Yet within these challenges lies opportunity: by inducting circular practices—such as waste-to-energy digesters, repurposed construction materials, and community recycling hubs—slums can transform hazards into resources. Circular solutions not only reduce illness and environmental damage but also generate livelihoods, strengthen resilience, and pave a way forward toward healthier, more sustainable urban futures.

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