World Solve

Trees can significantly cool city temperatures, but planting and maintaining enough urban canopy to meaningfully offset rising heat requires long-term investment many cities haven't sustained. Closing this gap remains an urgent urban planning challenge.

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.

Many major rivers depend on glacial melt for a steady water supply, and as these glaciers shrink, the long-term water security of downstream populations becomes increasingly uncertain. Protecting or planning around this shrinking resource remains unresolved.

Construction and demolition debris makes up a significant share of total waste in many rapidly growing cities, and recycling this material at scale remains inconsistently practiced. Reducing this waste stream remains an unresolved urban sustainability issue.

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.

As temperatures rise, alpine species are forced to migrate to higher elevations, but many eventually run out of mountain left to climb, risking extinction. Protecting these increasingly squeezed ecosystems remains an unresolved conservation priority.

Many e-waste recycling operations, particularly in lower-income countries, expose workers to toxic materials with inadequate safety protections. Making this growing industry both effective and safe for workers remains an unresolved labor and environmental issue.

Dams provide clean energy and water management benefits but can block the migration routes that many freshwater fish species depend on to reproduce. Designing infrastructure that serves both human and ecological needs remains an unresolved engineering challenge.

Many reforestation projects plant fast-growing single species rather than rebuilding complex, biodiverse forest ecosystems, which limits their true ecological value. Making these projects genuinely restorative rather than just visually green remains an unresolved challenge.

Many cities' stormwater systems combine sewage and rainwater runoff, and heavy storms can cause this combined overflow to discharge untreated into nearby waterways. Fully separating and managing this runoff remains a costly, unresolved infrastructure challenge.

Freshwater mussels play an important role in filtering water and supporting aquatic ecosystems, but they're highly sensitive to pollution and warming, and many populations are declining as a result. Protecting this often overlooked species remains an unresolved conservation issue.

Degraded peatlands release significant amounts of stored carbon, and restoring them to their natural, carbon-storing state requires careful, sustained management that many restoration projects don't achieve. Making this restoration reliably effective remains unresolved.

Invasive plant species can spread aggressively in forest understories, crowding out native plants that many forest animals depend on for food and habitat. Effective, scalable control of this lower-profile but significant ecological threat remains incomplete.

Many consumer electronics are built in ways that make repair difficult or uneconomical, encouraging early replacement and contributing significantly to electronic waste. Shifting the industry toward genuinely repairable design remains an unresolved manufacturing and policy challenge.

As electric vehicle adoption grows, local power grids in many areas aren't yet built to handle the sudden, concentrated demand spikes from many vehicles charging simultaneously. Upgrading this infrastructure fast enough remains an unresolved challenge.

Migrating decades-old databases to modern systems carries real risk of subtle data corruption or loss, and fully automated, zero-risk migration tools remain unavailable for many complex legacy systems. This keeps organizations tied to outdated, harder-to-maintain infrastructure.

Many cities, especially in lower-income regions, lack dense, affordable air quality sensor networks capable of providing residents with accurate, real-time pollution information. Closing this monitoring gap remains an unresolved public health infrastructure challenge.

Even devices marketed for outdoor visibility can become difficult to read in direct sunlight, limiting usability during many common outdoor activities. A fully effective, affordable anti-glare solution remains elusive.

Smart thermostats have improved efficiency, but many systems still require manual adjustment to truly optimize comfort without wasting energy throughout changing conditions. Fully automated, effective climate optimization remains an unresolved technical challenge.

Many home security systems still generate frequent false alerts from pets, shadows, or weather, reducing their practical reliability for identifying genuine security concerns. Improving this accuracy without expensive hardware remains unresolved.