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
open
Europe / Unspecified, Europe
Extreme events cause health impacts and infrastructure damage, testing adaptation plans. Urban heat and flood-risk modelling tools plus nature-based solution marketplaces can support responses.
climate-environment
europe
europe-unspecified
climate-change
flooding
heatwaves
driven
climate
change
increasingly
hit
european
cities
extreme
society-governance
urban
governance
african
open
Europe / Unspecified, Europe
Transport and industrial emissions continue to cause health burdens despite progress. Low-cost sensor networks and policy-impact simulators can guide clean-air strategies.
climate-environment
europe
europe-unspecified
air
quality
several
european
urban
regions
remains
below
standards
transport
global-unspecified
african
pollution
access
open
Europe / Unspecified, Europe
Transport and industrial emissions continue to cause health burdens despite progress. Low-cost sensor networks and policy-impact simulators can guide clean-air strategies.
climate-environment
europe
europe-unspecified
air
quality
several
european
urban
regions
remains
below
standards
variant
global-unspecified
african
data
infrastructure
open
Europe / Unspecified, Europe
Bridges, tunnels, and rail lines built decades ago require expensive renovation at a time of fiscal pressure. Asset-condition mapping and lifecycle-finance tools can prioritise investment.
climate-environment
europe
europe-unspecified
ageing
transport
infrastructure
needs
major
renewal
bridges
tunnels
rail
african
systems
africa
climate
global-unspecified
remains
open
Europe / Unspecified, Europe
Changing rainfall patterns and heat waves strain agriculture and urban supplies. Basin-level modelling and demand-management platforms can help cities and farmers adapt.
climate-environment
europe
europe-unspecified
water-scarcity
water
scarcity
droughts
increasingly
affecting
southern
changing
rainfall
patterns
urban
cities
african
climate
global-unspecified
open
Europe / Unspecified, Europe
Intensive agriculture and urban expansion reduce habitats for key species. Monitoring tools and incentive platforms for nature-positive land use can support recovery.
climate-environment
europe
europe-unspecified
biodiversity
loss
european
landscapes
threatens
ecosystem
services
intensive
agriculture
urban
global-unspecified
african
society-governance
systems
monitoring
open
United States, North America
Kepler and other missions have identified thousands of exoplanets, but we lack robust statistics on Earth-size worlds with stable climates and liquid water. Next-generation transit and direct-imaging missions must refine occurrence rates.
climate-environment
north-america
united-states
not
know
common
truly
earth-like
habitable
planets
missions
kepler
global-unspecified
whether
philosophy-ethics
science-space
don
determine
open
Global / Unspecified, Global
Observations show billion-solar-mass black holes early in cosmic history, which standard growth models struggle to explain. Improved surveys of high-redshift quasars and simulations of direct-collapse scenarios are needed.
climate-environment
global-unspecified
black
holes
not
fully
understand
supermassive
form
grow
observations
show
science-space
know
dark
matter
actually
what
open
Global / Unspecified, Global
Moons like Europa and Enceladus may harbor oceans beneath ice, but we do not know their chemical gradients or energy sources. Cryobot and plume-sampling missions could test for conditions suitable for life.
climate-environment
global-unspecified
lack
precise
constraints
habitability
subsurface
ocean
worlds
moons
like
europa
know
philosophy-ethics
whether
mathematics-logic
don
determine
open
Global / Unspecified, Global
Objects in the distant solar system could reveal formation history and the presence of rogue planets, but only a few have been discovered. Wide-field deep surveys and improved orbit determination are needed.
climate-environment
global-unspecified
distribution
small
bodies
beyond
kuiper
belt
poorly
mapped
objects
distant
whether
know
philosophy-ethics
science-space
don
have
open
Global / Unspecified, Global
Observed exoplanet diversity challenges simple core-accretion models. High-resolution imaging of disks and improved simulations are needed.
climate-environment
global-unspecified
models
disks
not
have
complete
planetary
formation
protoplanetary
observed
exoplanet
science-space
know
fully
whether
understand
open
Global / Unspecified, Global
Galaxies stop forming stars due to feedback and environment, but mechanisms vary. Surveys across environments and redshifts can clarify.
climate-environment
global-unspecified
processes
governing
galaxy
quenching
not
fully
understood
galaxies
stop
forming
know
science-space
mathematics-logic
haven
whether
philosophy-ethics
open
Global / Unspecified, Global
Loose aggregates behave differently from solid rock in impacts and mining. In situ missions and modeling can guide hazard mitigation and resource use.
climate-environment
global-unspecified
lack
comprehensive
models
asteroid
rubble-pile
structures
loose
aggregates
behave
differently
science-space
technology-computing
impacts
standardized
mining
society-governance
open
Global / Unspecified, Global
Floods, droughts, and storms repeatedly erase assets for low-income families. Climate-resilient housing and micro-insurance products can help absorb shocks.
climate-environment
global-unspecified
shocks
climate
push
households
back
poverty
modest
gains
floods
droughts
economics-resources
products
income
against
community
scale
open
Global / Unspecified, Global
Weak storage, transport, and retail systems let food spoil while hunger persists. Cold-chain investment and circular food-business models can reduce loss.
climate-environment
global-unspecified
food
loss
waste
account
third
production
weak
storage
transport
systems
society-governance
whether
philosophy-ethics
reducing
economics-resources
open
Global / Unspecified, Global
Traditional staples become harder to grow in regions facing heat and drought. Climate-resilient seeds and diversified cropping systems can buffer risk.
climate-environment
global-unspecified
climate-change
climate
change
already
shifting
crop
viability
zones
traditional
staples
become
systems
society-governance
building
under
governance
open
Global / Unspecified, Global
Untreated sewage pollutes rivers and coasts. Decentralized treatment plants and enforcement are needed.
climate-environment
global-unspecified
wastewater
rarely
treated
discharge
cities
untreated
sewage
pollutes
rivers
coasts
urban
african
water
systems
whether
philosophy-ethics
open
Global / Unspecified, Global
Water planning based on historical norms is becoming unreliable. Scenario-based planning and storage investments are needed.
climate-environment
global-unspecified
climate-change
climate
change
altering
rainfall
patterns
drought
frequency
planning
water
based
society-governance
governance
cities
building
urban
open
Global / Unspecified, Global
Non-revenue water undermines sustainability. IoT leak detection and smart metering can reduce losses.
climate-environment
global-unspecified
water
urban
utilities
lose
large
shares
leaks
theft
non-revenue
undermines
african
don
cities
whether
asia
long
open
Global / Unspecified, Global
Remote and poor communities remain off-grid. Decentralized renewables and finance innovations can expand access.
climate-environment
global-unspecified
access
hundreds
millions
lack
electricity
remote
poor
communities
remain
off-grid
economics-resources
african
society-governance
social-civic-problems
remains
low