Secondary cities often lack the metro or bus rapid transit systems that ease congestion in capitals, forcing reliance on private vehicles. Lower-cost bus rapid transit models could be replicated more widely.
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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Every problem has a stable citation code for reference and discussion.
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Builder-oriented
Use the repository to find startup ideas, policy leads, and research agendas.
We haven't solved how to prevent algorithmic bias from creeping into automated decision systems.
open
Global / Unspecified, Global
Hiring tools, loan approval systems, and other automated decisions can unintentionally replicate historical biases present in their training data. Fully eliminating this bias while keeping systems useful remains unresolved.
We can't yet build space habitats that fully replicate Earth-like gravity for long-term health.
open
Global / Unspecified, Global
Living without normal gravity weakens astronauts' bones and muscles over time. Practical, affordable ways to simulate gravity in space stations remain mostly untested at scale.
We haven't solved how to make scientific research results replicate consistently across different labs.
open
Global / Unspecified, Global
A surprising number of published scientific results can't be reproduced when other researchers try the same experiment, undermining trust in published findings. Fixing this reproducibility gap is essential to keeping science reliable.