World Solve — A living repository of problems worth solving.

What World Solve is

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.

For builders Skip the search for a problem worth your time. Browse a vetted, growing list and start where the gap is real.

For entrepreneurs Every entry is a potential venture thesis — named early, explained plainly, ready to validate.

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We lack closed-loop biological carbon dioxide scrubbers for human spacecraft cabins.

open Global / Unspecified, Global

Chemical lithium-hydroxide canisters are consumable, heavy, and wasteful for multi-year missions. Algae photo-bioreactors capable of converting human exhaled CO2 directly into oxygen and edible protein are required.

human lack closed loop biological climate-environment

WS02142 · Logged by Ian Patel on 2026-07-22T08:00:00Z · Horizon: 2029 · Working on: 0

Citation ID: WS02142 Title: We lack closed-loop biological carbon dioxide scrubbers for human spacecraft cabins. URL: https://worldsolve.org/index.php?api=problem&id=2142

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2165 public problems
2165 open challenges
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