World Solve

Countries facing population decline may seek to influence reproductive decisions. The challenge is supporting people who want children, respecting those who do not, and addressing housing, work, care, and gender conditions rather than using coercive targets. 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.

The problem of agricultural chemicals driving the decline of bees continues to affect hundreds of millions of people and undermines progress on multiple Sustainable Development Goals. Existing responses remain fragmented, under-resourced and poorly adapted to local contexts. A strong solution must operate effectively under severe constraints of skilled personnel, infrastructure, electricity and connectivity. It should define clear measurable outcomes, identify possible unintended harms, and demonstrate how the intervention can be sustained by local institutions long after initial funding ends.

Dependence on fishing increases vulnerability. Blue-economy diversification can help.

Coal remains the cheapest and most reliable power source for many governments despite pollution and climate costs. Faster cost declines in battery storage could accelerate the shift to renewables.

Long-duration missions to Mars risk irreversible DNA damage, cognitive decline, and cancer in astronauts. Lightweight, high-efficiency passive shielding or active electromagnetic deflectors remain undeveloped.

Opaque national food storage figures cause neighboring Asian countries to impose immediate export bans during minor crop declines, artificially spiking global food prices.

Bright coastal lights and sea-wall construction disrupt endangered sea turtle egg-laying beaches, causing steep declines in hatchling survival rates.

Subtle cognitive changes often precede a formal dementia diagnosis by years, but current screening tools aren't sensitive enough to reliably catch this earliest stage. Better early detection could open the door to earlier, more effective intervention.

Hormonal changes after menopause accelerate bone loss, increasing fracture risk, and current prevention methods only partially offset this decline. A more effective, targeted prevention approach remains needed.

Sleep apnea, when left untreated for years, is linked to cognitive decline and other health issues, yet many cases go undiagnosed simply because symptoms are mistaken for normal fatigue. Earlier, more widespread detection remains an unmet need.

COPD gradually reduces lung function over years, and while treatment can ease symptoms and slow decline, it can't reverse the underlying lung damage. A cure remains out of reach for the millions living with this condition.

Even mild traumatic brain injuries can cause lasting cognitive effects that current treatments struggle to fully reverse. A better understanding of brain recovery mechanisms could open new treatment paths.

Age-related muscle loss, known as sarcopenia, contributes to frailty and falls in older adults, and current treatments rely mainly on exercise and diet rather than addressing the underlying biological decline. A more direct medical solution remains undeveloped.

Fertility treatments like IVF help many people conceive, but success rates still drop significantly with age due to biological factors that current medicine can't fully reverse. Understanding and addressing this decline remains incomplete.

Kidney disease often advances silently for years before symptoms appear, and by the time it's caught, treatment options are limited mainly to slowing further decline. Catching and reversing it earlier remains an open medical challenge.

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.

Languages carry unique cultural knowledge and identity, but preservation efforts sometimes conflict with the practical choices speakers themselves make about which language serves them best. This unresolved tension complicates cultural preservation debates.

Bee populations have declined sharply in many regions, partly due to pesticide exposure, threatening the pollination that much of global food production depends on. A farming approach that protects both crops and pollinators remains incomplete.

Insect populations, including many pollinators, have been declining in various regions due to habitat loss, pesticide use, and climate change, threatening the broader ecosystems and agriculture that depend on them. Reversing this decline at scale remains unresolved.

A fungal disease combined with habitat destruction has driven sharp declines in amphibian populations across many regions, and effective large-scale intervention remains limited. Protecting these ecologically important species remains an unresolved conservation priority.