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.
Publicly citable
Every problem has a stable citation code for reference and discussion.
Filtered by relevance
Search by category, geography, status, and keywords.
Builder-oriented
Use the repository to find startup ideas, policy leads, and research agendas.
4194Total
4194Open
0Solved
9Humans
open
Global / Unspecified, Global
Fishing fleets can evade detection in vast, poorly monitored ocean areas, undermining conservation efforts meant to protect fish populations. Better real-time monitoring at sea remains a critical unsolved gap.
society-governance
global-unspecified
fishing
fish
yet
stop
illegal
depleting
stocks
faster
regulations
respond
philosophy-ethics
whether
climate-environment
mathematics-logic
way
prevent
open
Global / Unspecified, Global
Bees and other pollinators face combined pressure from pesticides, habitat loss, and disease, and addressing just one threat rarely solves the overall decline. A comprehensive solution addressing all major threats together remains unbuilt.
health-biology
global-unspecified
threats
face
haven
found
way
protect
pollinator
populations
multiple
once
philosophy-ethics
whether
prevent
determine
mathematics-logic
resolved
open
Global / Unspecified, Global
Many products marketed as biodegradable still break down into tiny plastic particles that persist in the environment for years. A truly safe, fully compostable packaging material remains elusive at scale.
climate-environment
global-unspecified
packaging
fully
yet
build
materials
decompose
safely
leaving
microplastics
behind
whether
philosophy-ethics
mathematics-logic
haven
resolved
health-biology
open
Global / Unspecified, Global
Chemicals and fertilizers seep into groundwater supplies over years, often going unnoticed until wells become unsafe to drink from. Preventing this contamination before it happens remains far harder than detecting it afterward.
local-regional
global-unspecified
groundwater
contamination
haven
solved
prevent
industrial
agricultural
runoff
chemicals
fertilizers
whether
philosophy-ethics
mathematics-logic
way
resolved
technology-computing
open
Global / Unspecified, Global
Wetlands filter water and protect against flooding, but restoring one once it's been drained or built over is far harder than protecting it in the first place. Better restoration techniques remain limited and expensive.
climate-environment
global-unspecified
have
wetlands
been
don
reliable
way
restore
destroyed
development
filter
whether
philosophy-ethics
determine
resolved
agreed
prevent
open
Global / Unspecified, Global
Non-native plants and animals often outcompete local species once introduced, and by the time damage is noticed, removal is difficult and expensive. Faster detection and response systems remain underdeveloped.
health-biology
global-unspecified
species
faster
stop
invasive
spreading
damaging
ecosystems
respond
non-native
plants
philosophy-ethics
whether
resolved
mathematics-logic
determine
prevent
open
Global / Unspecified, Global
Raising cattle and other livestock produces a significant share of global methane emissions, yet meat remains a major part of diets worldwide. A lower-emission farming method that doesn't require giving up meat entirely remains unsolved.
climate-environment
global-unspecified
livestock
emissions
haven
solved
farm
contributing
heavily
greenhouse
gas
meat
philosophy-ethics
whether
mathematics-logic
way
determine
resolved
open
Global / Unspecified, Global
Some island nations face the real possibility of becoming uninhabitable within decades due to sea level rise. Cheap, effective coastal protection or relocation planning remains urgently unsolved for these communities.
health-biology
global-unspecified
island
nations
haven
found
affordable
way
protect
low-lying
being
submerged
philosophy-ethics
whether
mathematics-logic
resolved
determine
communities
open
Global / Unspecified, Global
Coding education often depends on expensive devices, reliable internet, and trained teachers, none of which are guaranteed in poorer school systems. Closing this gap could open technology careers to far more young people.
social-civic-problems
global-unspecified
coding
haven
found
scalable
way
teach
basic
skills
students
under-resourced
whether
philosophy-ethics
systems
mathematics-logic
resolved
determine
open
Global / Unspecified, Global
Even advanced AI systems sometimes generate plausible-sounding but incorrect answers, and users often can't tell the difference without checking elsewhere. A dependable way to prevent this remains unsolved.
mathematics-logic
global-unspecified
way
don
have
foolproof
stop
chatbots
confidently
stating
false
information
philosophy-ethics
whether
resolved
determine
agreed
prevent
open
Global / Unspecified, Global
Satellite internet can reach remote areas traditional cables can't, but current pricing puts it out of reach for many of the people who need it most. Bringing the cost down could close a major digital divide.
science-space
global-unspecified
satellite
internet
haven
solved
make
affordable
enough
world
poorest
regions
whether
philosophy-ethics
mathematics-logic
technology-computing
digital
open
Global / Unspecified, Global
Personal information is scattered across emails, cloud drives, apps, and devices, with no single reliable way to search across all of it. A unified, private personal search tool remains unbuilt.
technology-computing
global-unspecified
search
personal
information
all
yet
build
tools
let
people
find
whether
philosophy-ethics
haven
resolved
determine
mathematics-logic
open
Global / Unspecified, Global
Modern prosthetic limbs can restore some movement, but most still can't let a person genuinely feel what they're touching. Restoring sensory feedback affordably remains a major unsolved bioengineering problem.
health-biology
global-unspecified
restore
don
have
affordable
widely
available
prosthetics
natural
sense
touch
whether
philosophy-ethics
determine
resolved
agreed
way
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.
technology-computing
global-unspecified
systems
bias
automated
haven
solved
prevent
algorithmic
creeping
decision
hiring
society-governance
whether
philosophy-ethics
mathematics-logic
resolved
climate-environment
open
Global / Unspecified, Global
Sending money internationally is often slow, expensive, or restricted depending on where you live, despite living in a supposedly connected digital economy. A truly borderless payment system remains unbuilt.
economics-resources
global-unspecified
digital
payment
don
have
interoperable
systems
work
equally
well
whether
philosophy-ethics
technology-computing
resolved
determine
way
open
Global / Unspecified, Global
Data breaches exposing millions of passwords happen with striking regularity, despite widespread awareness of the problem. A more fundamentally secure approach to authentication is still needed.
health-biology
global-unspecified
breaches
haven
found
way
stop
password
happening
regularly
data
exposing
whether
philosophy-ethics
mathematics-logic
prevent
resolved
technology-computing
open
Global / Unspecified, Global
Once deployed, a model could be subtly altered or poisoned without obvious signs, potentially changing its behavior in harmful ways. There's no simple, universal way yet to verify a model is exactly as it was originally trained.
health-biology
global-unspecified
model
way
don
have
reliable
detect
has
been
secretly
tampered
philosophy-ethics
whether
determine
resolved
agreed
open
Global / Unspecified, Global
Many people experience nausea, eye strain, or discomfort after even short VR sessions, limiting its use for work or long entertainment sessions. A truly comfortable headset remains an unsolved hardware and software challenge.
technology-computing
global-unspecified
comfortable
haven
solved
make
virtual
reality
enough
extended
daily
sessions
whether
philosophy-ethics
mathematics-logic
resolved
way
open
Global / Unspecified, Global
Countless websites, articles, and pages vanish permanently when companies shut down or servers go offline. Without better and more complete web archiving, we risk losing large chunks of internet history.
philosophy-ethics
global-unspecified
websites
don
have
good
way
archive
online
content
disappear
forever
whether
resolved
determine
agreed
prevent
open
Global / Unspecified, Global
Early brain-computer interfaces show promise for people with paralysis, but they remain expensive, invasive, or unreliable outside controlled lab settings. Making them practical for everyday use is still unsolved.
technology-computing
global-unspecified
brain-computer
interfaces
outside
haven
created
affordable
work
reliably
laboratory
early
philosophy-ethics
whether
health-biology
mathematics-logic
determine
solved