World Solve

childcare remaining prohibitively expensive 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.

Shipping structural habitat materials from Earth is cost-prohibitive. We must develop 3D-sintering or concrete binder technologies that use local soil to withstand vacuum pressure and severe thermal cycling.

Digital platforms and assistive devices remain cost-prohibitive or unadapted for regional languages, excluding millions of persons with disabilities from the growing digital workforce.

Standard lithium-ion battery arrays suffer accelerated degradation in tropical ambient temperatures, making grid-scale battery storage prohibitively expensive.

Complex, legacy land ownership patterns in urban centers make land assembly prohibitively expensive for municipal social housing development.

Laying physical fiber cable across mountains, deserts, or widely scattered rural populations is often prohibitively expensive relative to the number of people served. Finding cost-effective alternatives for these hard-to-reach areas remains unresolved.

Modern hearing aids remain prohibitively expensive for a large share of the global population that could benefit from them, leaving hearing loss untreated in many communities. Making this technology genuinely affordable at scale remains unresolved.

Many remote communities still lack consistent access to electricity because building traditional grid infrastructure to reach them is prohibitively expensive. Affordable, reliable off-grid alternatives remain incompletely developed and deployed at scale.

The absence of robust, context-adapted solutions for galactic cosmic ray shielding without prohibitive mass penalties 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.

A persistent gap exists in realizing practical, scalable solutions for galactic cosmic ray shielding without prohibitive mass penalties. Scientific understanding, engineering readiness and institutional capacity remain insufficient to translate promising concepts into durable impact under real-world constraints of cost, skills and governance.

Develop storage approaches that shift renewable energy across weeks or months rather than only across hours, without prohibitive material or infrastructure costs.