Water scarcity and droughts are increasingly affecting southern Europe.
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
asia
infrastructure
Citation ID: WS01909
Title: Water scarcity and droughts are increasingly affecting southern Europe.
URL: https://www.worldsolve.org/index.php?api=problem&id=1909
Biodiversity loss in European landscapes threatens ecosystem services.
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
continues
water
land
waste
Citation ID: WS01910
Title: Biodiversity loss in European landscapes threatens ecosystem services.
URL: https://www.worldsolve.org/index.php?api=problem&id=1910
Digital skills gaps hinder Europe’s green and digital transitions.
open
Europe / Unspecified, Europe
Large parts of the workforce lack the advanced skills needed for emerging sectors. Regional upskilling platforms and employer-linked training marketplaces can close gaps.
technology-computing
europe
europe-unspecified
digital
skills
gaps
hinder
green
transitions
large
parts
workforce
african
remains
asia
rural
global-unspecified
lack
Citation ID: WS01911
Title: Digital skills gaps hinder Europe’s green and digital transitions.
URL: https://www.worldsolve.org/index.php?api=problem&id=1911
Europe’s university research faces pressure to commercialise without clear pathways.
open
Europe / Unspecified, Europe
Academics are urged to create impact but navigate complex IP and funding landscapes. University-industry matchmaking platforms and impact-oriented grant tools could help.
technology-computing
europe
europe-unspecified
university
research
faces
pressure
commercialise
clear
pathways
academics
urged
africa
african
remains
struggle
systems
climate
Citation ID: WS01912
Title: Europe’s university research faces pressure to commercialise without clear pathways.
URL: https://www.worldsolve.org/index.php?api=problem&id=1912
Public trust in media varies widely across European countries.
open
Europe / Unspecified, Europe
Perceptions of bias and ownership concentration affect news consumption. Transparency dashboards and trust indicators for outlets could support healthier information ecosystems.
society-governance
europe
europe-unspecified
trust
public
media
varies
widely
european
countries
perceptions
bias
ownership
global-unspecified
whether
philosophy-ethics
know
institutions
Citation ID: WS01913
Title: Public trust in media varies widely across European countries.
URL: https://www.worldsolve.org/index.php?api=problem&id=1913
Smart-city projects in Europe often struggle with citizen buy-in.
open
Europe / Unspecified, Europe
Tech-driven initiatives can feel top-down, raising privacy and inclusion concerns. Co-design platforms and impact assessment tools could improve legitimacy.
local-regional
europe
europe-unspecified
smart-city
projects
often
struggle
citizen
buy-in
tech-driven
initiatives
feel
african
lack
tools
africa
global-unspecified
funding
Citation ID: WS01914
Title: Smart-city projects in Europe often struggle with citizen buy-in.
URL: https://www.worldsolve.org/index.php?api=problem&id=1914
Cross-border healthcare access in Europe is complex despite free movement.
open
Europe / Unspecified, Europe
Patients face administrative and reimbursement barriers when seeking care abroad. Interoperable health-data and insurance coordination tools can ease mobility.
health-biology
europe
europe-unspecified
cross-border
healthcare
access
complex
despite
free
movement
patients
face
african
global-unspecified
remains
africa
digital
affordable
Citation ID: WS01915
Title: Cross-border healthcare access in Europe is complex despite free movement.
URL: https://www.worldsolve.org/index.php?api=problem&id=1915
Mental health services in Europe are unevenly distributed and under-resourced.
open
Europe / Unspecified, Europe
Waiting lists and regional disparities leave many without timely support. Digital triage and service-navigation platforms could optimise access.
technology-computing
europe
europe-unspecified
mental-health
mental
health
services
unevenly
distributed
under-resourced
waiting
lists
regional
access
remains
african
global-unspecified
digital
Citation ID: WS01916
Title: Mental health services in Europe are unevenly distributed and under-resourced.
URL: https://www.worldsolve.org/index.php?api=problem&id=1916
Europe’s prisons struggle with rehabilitation and reintegration outcomes.
open
Europe / Unspecified, Europe
Recidivism remains high in many systems, especially among youth. Evidence-based rehabilitation program platforms and outcome-tracking tools can support reform.
economics-resources
europe
europe-unspecified
rehabilitation
prisons
struggle
reintegration
outcomes
recidivism
remains
high
systems
global-unspecified
technology-computing
whether
africa
african
mathematics-logic
Citation ID: WS01917
Title: Europe’s prisons struggle with rehabilitation and reintegration outcomes.
URL: https://www.worldsolve.org/index.php?api=problem&id=1917
We still do not know what dark matter actually is.
open
Global / Unspecified, Global
Astronomical observations demand extra unseen mass, but candidate particles from extensions of the Standard Model remain undetected. New detector designs, astrophysical surveys, and theoretical models are needed to pin down its nature.
science-space
global-unspecified
not
know
dark
matter
actually
astronomical
observations
demand
extra
unseen
what
fully
understand
Citation ID: WS01800
Title: We still do not know what dark matter actually is.
URL: https://www.worldsolve.org/index.php?api=problem&id=1800
The cause of dark energy and cosmic acceleration remains unknown.
open
Global / Unspecified, Global
Cosmological data show the Universe’s expansion speeding up, yet we lack a clear physical mechanism beyond a simple cosmological constant. Precision surveys and alternative gravity theories could clarify whether dark energy is a new field or modified gravity.
mathematics-logic
global-unspecified
dark
energy
cause
cosmic
acceleration
remains
unknown
cosmological
gravity
data
science-space
know
fully
understand
actually
matter
Citation ID: WS01801
Title: The cause of dark energy and cosmic acceleration remains unknown.
URL: https://www.worldsolve.org/index.php?api=problem&id=1801
We do not know whether life exists beyond Earth.
open
Global / Unspecified, Global
Searches for biosignatures on Mars, Europa, Enceladus, and exoplanets have yet to find definitive evidence, and our detection tools are still crude. Better instruments for atmospheric spectroscopy and in situ sampling are required.
philosophy-ethics
global-unspecified
not
know
whether
life
exists
beyond
earth
searches
biosignatures
mars
resolved
mathematics-logic
determine
don
haven
possible
Citation ID: WS01802
Title: We do not know whether life exists beyond Earth.
URL: https://www.worldsolve.org/index.php?api=problem&id=1802
The origin of the matter–antimatter asymmetry in the Universe is unresolved.
open
Global / Unspecified, Global
Big Bang models suggest equal amounts of matter and antimatter, yet the observable Universe is dominated by matter. Precision measurements of CP violation and new physics at high energies could explain the imbalance.
science-space
global-unspecified
matter
antimatter
universe
origin
asymmetry
unresolved
big
bang
models
suggest
know
dark
actually
what
fully
understand
Citation ID: WS01803
Title: The origin of the matter–antimatter asymmetry in the Universe is unresolved.
URL: https://www.worldsolve.org/index.php?api=problem&id=1803
We lack a complete quantum theory of gravity.
open
Global / Unspecified, Global
General relativity and quantum field theory conflict at extreme densities, such as inside black holes and at the Big Bang. Progress in string theory, loop quantum gravity, and holographic dualities could lead to a consistent framework.
mathematics-logic
global-unspecified
quantum
theory
gravity
lack
complete
general
relativity
field
conflict
extreme
whether
know
haven
possible
every
philosophy-ethics
Citation ID: WS01804
Title: We lack a complete quantum theory of gravity.
URL: https://www.worldsolve.org/index.php?api=problem&id=1804
The internal structure and evolution of exoplanet atmospheres are poorly understood.
open
Global / Unspecified, Global
Current models rely on limited spectra from a small subset of planets, often with degeneracies in composition and cloud structure. High-resolution time-resolved spectroscopy and improved atmospheric retrieval algorithms are needed.
technology-computing
global-unspecified
structure
internal
evolution
exoplanet
atmospheres
poorly
understood
current
models
rely
know
science-space
fully
Citation ID: WS01805
Title: The internal structure and evolution of exoplanet atmospheres are poorly understood.
URL: https://www.worldsolve.org/index.php?api=problem&id=1805
We do not know how common truly Earth-like habitable planets are.
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
philosophy-ethics
whether
science-space
earth
mathematics-logic
Citation ID: WS01806
Title: We do not know how common truly Earth-like habitable planets are.
URL: https://www.worldsolve.org/index.php?api=problem&id=1806
The detailed processes that drive star formation from molecular clouds remain unclear.
open
Global / Unspecified, Global
Turbulence, magnetic fields, and feedback from young stars interact in complex ways to set stellar masses and rates. Multi-scale simulations and high-resolution observations with radio and infrared telescopes can help disentangle these effects.
science-space
global-unspecified
detailed
processes
drive
star
formation
molecular
clouds
remain
unclear
turbulence
lack
interstellar
magnetic
Citation ID: WS01807
Title: The detailed processes that drive star formation from molecular clouds remain unclear.
URL: https://www.worldsolve.org/index.php?api=problem&id=1807
We still do not fully understand how supermassive black holes form and grow.
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
know
matter
science-space
dark
actually
what
Citation ID: WS01808
Title: We still do not fully understand how supermassive black holes form and grow.
URL: https://www.worldsolve.org/index.php?api=problem&id=1808
The nature of fast radio bursts remains mysterious.
open
Global / Unspecified, Global
These millisecond bursts of radio energy come from cosmological distances, but their progenitors are uncertain, ranging from magnetars to exotic compact objects. Coordinated multi-wavelength observations and rapid follow-up networks could identify their sources.
mathematics-logic
global-unspecified
radio
bursts
nature
fast
remains
mysterious
these
millisecond
energy
come
whether
science-space
philosophy-ethics
know
don
have
Citation ID: WS01809
Title: The nature of fast radio bursts remains mysterious.
URL: https://www.worldsolve.org/index.php?api=problem&id=1809
Space weather effects on planetary atmospheres are not fully quantified.
open
Global / Unspecified, Global
Solar flares, coronal mass ejections, and stellar winds shape atmospheric escape and habitability, yet models remain approximate. Continuous monitoring and improved magnetohydrodynamic simulations can refine predictions.
science-space
global-unspecified
space
weather
effects
planetary
atmospheres
not
fully
quantified
solar
flares
know
understand
dark
matter
actually
Citation ID: WS01810
Title: Space weather effects on planetary atmospheres are not fully quantified.
URL: https://www.worldsolve.org/index.php?api=problem&id=1810
