World Solve — A living repository of problems worth solving.

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World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

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Wastewater is rarely treated before discharge in many cities.

open Global / Unspecified, Global

Untreated sewage pollutes rivers and coasts. Decentralized treatment plants and enforcement are needed.

climate-environment global-unspecified wastewater rarely treated discharge cities untreated sewage pollutes rivers coasts urban water african asia systems waste

WS01695 · Logged by Ian Patel on 2026-07-22T14:20:00Z · Working on: 0

Citation ID: WS01695 Title: Wastewater is rarely treated before discharge in many cities. URL: https://www.worldsolve.org/index.php?api=problem&id=1695

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2165 public problems
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