World Solve

Carbon capture technology can reduce emissions from heavy industry, but current costs remain too high for most companies to adopt voluntarily without strong regulatory or financial incentives. Making this technology genuinely affordable at scale remains unresolved.

Monarch butterflies depend on specific milkweed habitats along their long migration routes, and the loss of this habitat across multiple countries has contributed to sharp population declines. Coordinating protection across their entire migratory range remains unresolved.

Heavy metal contamination can persist in soil for decades, affecting both agricultural productivity and human health in nearby communities. Effective, affordable soil remediation at scale remains an unresolved environmental 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.

Grasslands store significant amounts of carbon in their soil and support unique biodiversity, but they continue to be converted to farmland at a pace that outstrips restoration efforts. Balancing agricultural needs with grassland conservation remains unresolved.

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.

Conventional cotton farming uses significant water and pesticides, and while more sustainable methods exist, they remain a small share of overall global production. Scaling sustainable practices to become the industry norm remains unresolved.

As cities and suburbs expand, they often replace the wildflower meadows and natural habitats that pollinators depend on with lawns and pavement. Designing urban growth that preserves pollinator habitat remains inconsistently practiced.

Coastal wetlands serve as critical habitat for many bird species, but pollution and development continue to degrade these areas faster than protection efforts can offset. Reversing this decline remains an unresolved conservation priority.

Solar and wind farms are essential for clean energy but can sometimes be built in locations that disrupt sensitive wildlife habitats if siting isn't carefully planned. Balancing rapid renewable deployment with habitat protection remains an ongoing challenge.

As demand grows for minerals used in batteries and electronics, deep-sea mining is expanding into ecosystems that remain poorly understood and could take centuries to recover from disruption. Regulating this before major damage occurs remains an unresolved governance and environmental challenge.

Escaped farmed fish can compete with, interbreed with, or spread disease to native wild fish populations, threatening genetic diversity and long-term population health. Preventing these escapes and their ecological impact remains an unresolved aquaculture industry challenge.

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.

Fish introduced into new waterways for recreational or food purposes can sometimes outcompete or prey on native species, causing lasting ecological disruption. Preventing or reversing this kind of introduction remains an unresolved conservation challenge.

Coastal dunes provide a natural barrier against storm surges, but development and recreational use continue to erode them faster than they can naturally rebuild. Protecting these ecosystems remains an underappreciated but unresolved coastal resilience challenge.

Sustainable building materials often cost more or aren't as widely available as traditional concrete and steel, slowing their adoption across the construction industry. Making green materials the default rather than the premium choice remains unresolved.

Managed honeybees, while important for agriculture, can sometimes outcompete native pollinator species for food resources when placed in sensitive natural areas. Balancing agricultural pollination needs with native species protection remains an unresolved ecological challenge.

Soot particles from fires and diesel engines can settle on snow and ice, absorbing more heat and accelerating melting beyond what temperature alone would cause. Reducing this pollution source at the scale needed to slow ice melt remains unresolved.

Artisanal mining, often for gold, frequently uses toxic mercury and lacks basic safety protections, harming both workers' health and nearby water systems. Making this widespread informal industry safer at scale remains an unresolved global challenge.

Oyster populations, which naturally filter and clean coastal water, have declined sharply in many regions due to overharvesting and pollution. Restoring these populations to meaningfully improve water quality again remains an unresolved conservation challenge.