World Solve

Addressing harm caused by excessive consumption of sugary drinks 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.

The problem of steadily rising food prices 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.

Future progress on human development and planetary health depends on solving rapid melting of polar ice sheets and glaciers. 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.

growing risk of mass species extinction remains one of the most urgent challenges of our time. Systems currently in place are inadequate for the scale and complexity of the problem. A successful approach must work where resources are scarcest and demonstrate clear, measurable results. It should identify possible harms, respect local agency, and show how the solution can be maintained and expanded by the communities it is meant to serve.

Addressing widespread destruction of wildlife habitats 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.

housing that remains unaffordable for ordinary families remains one of the most urgent challenges of our time. Systems currently in place are inadequate for the scale and complexity of the problem. A successful approach must work where resources are scarcest and demonstrate clear, measurable results. It should identify possible harms, respect local agency, and show how the solution can be maintained and expanded by the communities it is meant to serve.

Cities may deploy scent systems that automatically adjust collective emotional states. Over time some residents develop tolerance or adverse reactions, creating uneven effects and new forms of environmental inequality. The problem is designing transparent, opt-outable, and medically safe atmospheric interventions that do not become tools of coercion or social control.

Some future climate interventions may have planetary effects while remaining scientifically and politically contested. The challenge is designing governance for experimentation, consent, liability, and termination before deployment escalates. The challenge is especially acute in informal settlements, where legacy systems, coordination failures, and weak oversight can magnify harm.

Governments may use health and behavioral data to predict outbreaks, allocate care, or target interventions. The open problem is enabling public-health benefits while preventing discrimination, mission creep, and privacy erosion. The challenge is especially acute in informal settlements, where legacy systems, coordination failures, and weak oversight can magnify harm.

The absence of robust, context-adapted solutions for institutional arrangements that accelerate the adoption of proven public health interventions creates cascading risks across interconnected human and natural systems. Key missing elements include durable performance, low lifetime cost, and governance arrangements capable of sustaining impact beyond pilot stages.

Current approaches to cognitive and social interventions that improve collective problem-solving under uncertainty either underperform under variable field conditions or generate externalities that undermine long-term sustainability and equity. Closing the gap requires coordinated advances in science, systems design and enabling institutions.

Resistance genes move through soil, water, and food chains, making hospital-focused interventions insufficient. One-Health regulatory frameworks and monitoring tools are required.

Access to anti-ageing interventions could be skewed toward wealthy groups without deliberate policy. Equity-oriented regulation and public programmes will be required.

Many countries lack timely, granular data on who is poor and why, leading to mistargeted interventions. Mobile and satellite-based poverty-mapping could improve program design.

Policies often ignore overlapping identities. Better data and analysis can inform nuanced interventions.

High urban housing costs exceed incomes. Affordable housing finance and supply-side interventions can help.

Resource use grows faster than population. Circular economy models can reduce footprints.

First 1,000-day programs that improve long-term outcomes are not widely available. Community-based early-childhood centers with nutrition and parenting support could fill the gap.

Women in many Asian countries earn less and participate in the formal workforce far less than men, despite comparable education levels. Flexible work policies and affordable childcare infrastructure could improve participation rates.

Many children with obesity go on to develop related health issues as adults, and current interventions haven't proven consistently effective at reversing childhood obesity at a population scale. A more effective, scalable approach remains an urgent unmet need.