World Solve

The metals inside batteries and electronics are difficult and expensive to recover once a device is thrown away, so most end up in landfills instead of being reused. Cheaper recycling would ease both supply shortages and environmental damage.

Some countries and industries pay a real cost for carbon emissions, while others pay nothing, creating an uneven playing field that undermines climate goals. A consistent global carbon price remains politically and technically unresolved.

Many major rivers and aquifers are being pumped or diverted faster than rainfall can replenish them, threatening long-term water security. Without better management, some regions may simply run out of accessible fresh water.

Paved surfaces send rainwater rushing into drains that quickly overflow during storms, instead of letting it soak into the ground. Cities designed to absorb water naturally would suffer far less flood damage.

Methane is a far more potent greenhouse gas than carbon dioxide in the short term, and much of it leaks unnoticed from pipelines and wells. Better detection and faster repairs could meaningfully slow near-term warming.

Droughts, floods, and shifting seasons are making traditional farming less reliable in many regions. Crops that can handle this unpredictability are essential to keeping global food supply stable.

Cement production alone accounts for a huge share of global carbon emissions, yet it remains central to nearly all construction. A low-carbon alternative that's just as strong and cheap would be one of climate policy's biggest wins.

Coral bleaching events are becoming more frequent as ocean temperatures rise, and restoration efforts are still small and slow. Without faster recovery methods, many reef ecosystems may not survive this century.

Hotter, drier conditions combined with decades of fire suppression have left forests primed to burn catastrophically. Managing this risk needs new approaches to land management, not just faster firefighting.

Fish farming was supposed to relieve pressure on wild fisheries, but many farms still rely on wild-caught fish for feed. A truly sustainable seafood system would need to break that dependency entirely.

Current recycling methods for batteries often use harsh chemicals or produce hazardous waste of their own. A cleaner recycling process would make the growing battery industry far more sustainable.

By the time illegal logging is discovered, the trees are often already gone and the damage is done. Real-time detection and enforcement could protect forests before, not after, they disappear.

Turning seawater into drinking water is technically possible but still too energy-intensive and expensive for many water-scarce regions. Cheaper desalination could solve water shortages for millions of people.

Modern farming often strips soil of nutrients faster than nature can replace them, threatening long-term food production. A farming method that restores rather than depletes soil could secure food supply for generations.

Millions of tons of plastic enter the ocean every year, and cleanup efforts remove only a small fraction of it. Without cutting the source and scaling removal, marine ecosystems will keep absorbing the damage.

Direct air capture exists, but it's still far too expensive and energy-intensive to make a dent in global emissions. Making it cheap enough to scale is one of the biggest levers left for slowing climate change.

As AI-generated accounts and bots flood social platforms, telling a real person from an automated one is getting harder. Without a trusted verification method, online trust and public discourse both suffer.

Even the best robots struggle with uneven terrain, sudden obstacles, or tasks requiring fine motor control that animals handle instinctively. Closing this gap would open up robotics for disaster response, farming, and elder care.

Training today's largest AI models can consume as much electricity as thousands of homes use in a year. Without more efficient methods, AI's environmental cost will keep climbing alongside its capabilities.

Old phones, laptops, and batteries pile up in landfills, leaking toxic materials while valuable metals inside go to waste. A cheap, safe recycling process could turn a growing pollution problem into a resource stream.