World Solve

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.

Various seafood sustainability labels exist, but standards and enforcement vary enough between certifying bodies that consumers can't always trust what a label truly guarantees. Creating a single, reliable global standard 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.

Some carbon offset programs have been found to overstate their actual climate benefit or allow the same emissions reduction to be claimed by multiple parties. Building a fully transparent, verifiable offset system remains an unresolved challenge.

Excess natural gas at oil extraction sites is often simply burned off rather than captured and used, wasting a valuable resource while releasing preventable emissions. Capturing this gas instead of flaring it remains inconsistently adopted across the industry.

Coastal development can interfere with natural sand replenishment processes, compounding the erosion already caused by rising sea levels. Balancing coastal development with long-term shoreline stability remains an unresolved planning challenge.

Textile factories, especially in regions with weaker environmental regulation, often release dye chemicals directly into rivers, causing serious water pollution. Making this process clean and affordable at industrial scale remains an unresolved challenge.

Ships can unintentionally transport invasive species across oceans in the water they carry for stability, introducing them to ecosystems where they can cause serious ecological disruption. Fully preventing this transfer remains inconsistently enforced globally.

Old-growth forests support unique biodiversity that can't simply be replaced by planting new trees, since the ecological complexity takes centuries to develop. Protecting the last remaining old-growth forests remains an urgent, unresolved conservation priority.

Colony collapse disorder continues to threaten commercial and wild bee populations that are essential for pollinating much of the global food supply. A comprehensive solution addressing all contributing factors at once remains unresolved.