World Solve

Ocean shipping produces a significant share of global greenhouse gas emissions, yet the industry has been slower than others to adopt cleaner fuel alternatives at scale. Speeding up this transition remains an unresolved climate challenge.

Kelp forests support diverse marine ecosystems but are increasingly vulnerable to warming waters and invasive species that outcompete them once they weaken. Restoring and protecting these ecosystems at scale remains an unresolved conservation challenge.

Many cities lack convenient composting systems, so a significant share of food waste that could be composted still ends up in landfills producing methane. Scaling accessible composting infrastructure remains an unresolved urban sustainability challenge.

Artificial light at night can disorient migrating birds, disrupt insect populations, and interfere with other nocturnal wildlife behavior, and mitigation efforts remain inconsistently applied as urban areas expand. Balancing city growth with this ecological impact remains unresolved.

Some of the world's largest aquifers are being pumped for irrigation and drinking water far faster than natural processes can refill them. Once fully depleted, these ancient water reserves may take centuries to recover, if they recover at all.

Sustainable aviation fuel exists but remains far more expensive and limited in supply than traditional jet fuel, keeping airline adoption slow. Scaling production to meet real demand remains an unresolved industry challenge.

Mangroves protect coastlines from storms and support rich ecosystems, but they continue to be cleared for development faster than restoration efforts can replace them. Speeding up restoration while slowing clearance remains unresolved.

Even with improved spill response technology, oil spills can leave lasting ecological damage that persists for years after the initial cleanup appears complete. Preventing spills in the first place remains far more effective than any current cleanup method.

As Arctic ice recedes, increased shipping and resource extraction activity adds further pressure to already fragile polar ecosystems. Balancing economic interest with ecological protection in this newly accessible region remains unresolved.

Underwater noise from ships can interfere with the way whales and other marine mammals communicate and navigate, and mitigation measures remain inconsistently enforced across major shipping routes. Reducing this impact remains an underaddressed conservation issue.

Algal blooms can produce toxins that harm both wildlife and humans, and they're becoming more frequent as waters warm and nutrient pollution continues from agricultural runoff. Preventing these blooms before they form remains an unresolved challenge.

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.

Unregulated mining, often for gold or other minerals, can introduce toxic chemicals like mercury into remote river systems, harming both ecosystems and downstream communities. Enforcement in these hard-to-reach areas remains inconsistent.

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.

Overgrazing, deforestation, and changing rainfall patterns continue to push arid regions toward full desertification faster than restoration projects can reverse. Scaling effective land restoration to match the pace of degradation remains unresolved.

Industrial chemicals can seep into groundwater and rivers used for drinking water, and cleanup once contamination occurs is often extremely difficult and expensive. Preventing contamination before it happens remains far more effective than remediation after the fact.

Wind turbine blades and other renewable energy components can be difficult and costly to recycle, creating a growing waste stream from an industry meant to be environmentally beneficial. Closing this lifecycle gap remains an unresolved sustainability challenge.

Tropical forests host a huge share of the world's biodiversity, and converting this land for farming, even when done for legitimate food needs, often results in permanent species loss. Balancing food production with biodiversity protection remains unresolved.

Salt and chemicals used to keep roads safe in winter can wash into nearby streams and lakes, harming aquatic life over time. Finding equally effective but less harmful alternatives remains an underaddressed environmental challenge.