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
Future progress on human development and planetary health depends on solving private finance not filling gaps. Conventional approaches have proven insufficient. The required intervention must integrate community knowledge, data and appropriate technology while remaining affordable, privacy-preserving and operable with minimal external support. Strong solutions will articulate measurable impact metrics, risk mitigation strategies, and a plan for sustained operation by local actors after the pilot phase.
private
finance
filling
gaps
developing
social-civic-problems
Addressing private armies existing is critical for achieving the 2030 Agenda. Current efforts fall short in scale, speed and equity, leaving the most vulnerable behind. Any viable solution must function in low-resource settings with limited specialists, transport, laboratory capacity and broadband. Proposals should specify quantifiable biological, social or environmental outcomes, openly discuss potential risks, and present a realistic pathway for long-term maintenance and local ownership beyond short research pilots.
private
armies
existing
2030
designing
mathematics-logic
open
Brazil, South America
Some companies may control capabilities with effects comparable to national infrastructure. International law needs mechanisms that assign duties to firms without allowing states to evade responsibility. The solution must work with limited capital, intermittent services, and local maintenance capacity. The research opportunity is to define measurable success criteria, test the approach in realistic settings, identify failure modes, and create a pathway from prototype to accountable deployment.
society-governance
south-america
brazil
mechanisms
firms
treaty
risks
created
private
technology
low-income
communities
some
technology-computing
economics-resources
climate-environment
systems
infrastructure
open
Brazil, South America
Future cities may depend on private platforms operating transit, energy, housing, communication, and public-space services. Strong public-interest rules are needed when essential services are controlled through private systems. The solution must work with limited capital, intermittent services, and local maintenance capacity. The research opportunity is to define measurable success criteria, test the approach in realistic settings, identify failure modes, and create a pathway from prototype to accountable deployment.
technology-computing
south-america
brazil
services
urban
governance
privately
operated
public
infrastructure
low-income
communities
private
economics-resources
society-governance
climate-environment
systems
quantum
Vegetation that bioluminesces beneath people carrying financial obligations creates public signalling of private economic status. The challenge is keeping urban biology free of involuntary debt disclosure.
debt
preventing
sidewalk
moss
glowing
economics-resources
Information encoded in residential ground requires excavation for retrieval and raises ownership and contamination risks. The challenge is creating durable, accessible biological storage that remains under the subject’s control.
securing
personal
data
stored
soil
mathematics-logic
Skin markings that automatically broadcast affective state remove the ability to keep feelings private. The challenge is preventing involuntary emotional disclosure through ambient body signalling.
emotional
protecting
facial
privacy
when
other
Silhouettes that lengthen or shorten according to predicted lifespan turn private health data into ambient visual information. The challenge is protecting individuals from involuntary longevity signalling in everyday environments.
signalling
preventing
shadows
publicly
remaining
climate-environment
Glass that selectively condenses in the presence of unresolved interpersonal tension turns private emotional states into visible signals. The challenge is preventing ambient architecture from becoming an involuntary emotion detector.
interpreting
window
fog
appears
only
technology-computing
Regulatory systems that license strong emotional odours can suppress natural human signalling and create enforcement disparities. The problem is managing genuine public nuisance without policing private affective states through smell.
emotional
protecting
expression
when
personal
other
If parks close at night on the grounds that vegetation requires solitude, human access to green space is reduced. The problem is integrating genuine ecological rest requirements with the continuous human need for outdoor refuge and recreation.
access
balancing
public
park
claimed
science-space
Local referenda that temporarily outlaw certain emotions create zones of enforced affective conformity. The problem is preserving the right to private and public emotional expression while still allowing communities to address genuine collective harms.
emotional
protecting
freedom
when
neighbourhoods
society-governance
Reflective surfaces that display a socially anticipated face rather than the actual one undermine personal identity and body autonomy. The problem is ensuring that basic self-viewing tools remain accurate and private rather than consensus-driven.
self
restoring
perception
when
mirrors
health-biology
Biological data repositories growing in public or private trees raise questions of ownership, access, and longevity. The problem is ensuring that information rooted in living organisms remains under the control of the original subject and does not become harvestable by third parties.
data
living
trees
securing
personal
mathematics-logic
When dreams are scored, shared, and sold like social content, intimate mental experiences become competitive and commercial. The problem is protecting the private, non-instrumental nature of dreaming while still permitting voluntary creative or therapeutic uses.
dreams
regulating
ranking
monetisation
personal
health-biology
If individuals can alter gravity in their private environments, public areas must still enforce uniform conditions for safety and fairness. The challenge is preventing spillover effects, health disparities, and social stratification based on access to customized physical laws.
public
gravity
private
maintaining
equitable
science-space
Transport systems may be increasingly optimized by private algorithms that control routing, pricing, access, and safety. The unresolved problem is ensuring these systems improve mobility for everyone rather than only for users who can pay most. The challenge is especially acute in informal settlements, where legacy systems, coordination failures, and weak oversight can magnify harm.
technology-computing
asia
bangladesh
mobility
informal
settlements
systems
public-interest
rules
autonomous
vehicles
platforms
transport
society-governance
climate-environment
public
across
governance
Private companies may increasingly run water, transport, energy, communication, and housing systems with public consequences. The open problem is designing regulation that ensures reliability, accountability, and public recourse when essential services fail. The challenge is especially acute in informal settlements, where legacy systems, coordination failures, and weak oversight can magnify harm.
society-governance
africa
nigeria
private
informal
settlements
governance
high-risk
infrastructure
operators
systems
public
companies
technology-computing
climate-environment
across
climate
open
European Union, Europe
Frontier AI may become essential infrastructure controlled by a small number of governments or companies. The unresolved task is developing ownership, access, competition, and public-interest models that prevent private or geopolitical concentration from determining global outcomes. The design must remain functional when standards, trade routes, data access, and diplomatic cooperation are unreliable. The research opportunity is to define measurable success criteria, test the approach in realistic settings, identify failure modes, and create a pathway from prototype to accountable deployment.
society-governance
europe
european-union
concentration
geopolitical
preventing
advanced
decision
power
under
fragmentation
access
frontier
technology-computing
economics-resources
climate-environment
systems
infrastructure
open
Mexico, North America
Future governments may depend on private firms for cloud services, AI tools, digital identity, and critical infrastructure software. The unresolved problem is designing procurement rules that preserve interoperability, portability, and long-term public control. The challenge is especially acute in informal settlements, where legacy systems, coordination failures, and weak oversight can magnify harm.
technology-computing
north-america
mexico
procurement
systems
informal
settlements
building
resist
vendor
lock-in
future
governments
society-governance
public
across
climate-environment
digital