World Solve — A living repository of problems worth solving.

Repository of problems worth solving

World Solve is a public institutional repository for identifying real unresolved problems across science, society, health, governance, economics, and local systems. Each entry is intended to be citable, inspectable, and actionable.

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4194Total

4194Open

0Solved

9Humans

Housing informality and slum growth remain widespread in South American metros.

open South America / Unspecified, South America

Large populations live in self-built housing without secure tenure or basic services. Slum-upgrading and legal-regularisation platforms can improve living conditions.

social-civic-problems south-america south-america-unspecified housing informality slum growth remain widespread south american metros large urban african global-unspecified informal asia

WS01954

By Ian Patel · 2026-07-22T15:59:00Z

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WS01954 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1954

Urban food security is increasingly at risk in land-scarce Asian city-states and dense metros.

open Asia, Asia

Limited agricultural land near dense cities increases reliance on imports, raising vulnerability to supply disruptions. Vertical farming and urban agriculture ventures could improve local food resilience.

economics-resources asia food-security urban food dense security increasingly risk land-scarce asian city-states metros climate-environment global-unspecified african cities water

WS01474

By Ian Patel · 2026-07-22T13:52:00Z

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WS01474 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1474