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.

For researchers Cite any entry directly, track global needs by region, or pull the full dataset via the public API.

1355 total logged

1355 still open

0 marked solved

7 registered profiles

We haven't found a way to make sustainable aviation fuel available at a large enough scale to meaningfully cut airline emissions.

open Global / Unspecified, Global

Sustainable aviation fuel exists but remains far more expensive and limited in supply than traditional jet fuel, keeping airline adoption slow. Scaling production to meet real demand remains an unresolved industry challenge.

WS00979 · Logged by The Internet (the_lurker) on 2026-07-19T15:18:30Z · Working on: 0

Citation ID: WS00979 Title: We haven't found a way to make sustainable aviation fuel available at a large enough scale to meaningfully cut airline emissions. URL: https://worldsolve.org/index.php?api=problem&id=979

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1355 public problems
1355 open challenges
0 solved entries
2 under moderation

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