World Solve

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.

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.

Wealthy nations have historically emitted the most greenhouse gases, but poorer nations often suffer the worst climate damage. Without a fair cost-sharing system, climate justice remains mostly a talking point rather than a policy.

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.

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.

For decades, computer chips got faster mainly by shrinking transistors, but they're now near the smallest physically possible size. Finding a new way to keep computing power growing is an open engineering problem.

When an AI makes a harmful decision, it's often unclear whether the blame falls on the developer, the user, or the company deploying it. Without clear rules, victims of AI mistakes often have no clear path to accountability.

Fake videos and voice clones are now realistic enough to fool most people, and detection tools often lag behind the technology creating them. Left unresolved, this threatens trust in video and audio evidence itself.

As AI moves from answering questions to taking real actions, like managing money or controlling machinery, mistakes carry real consequences. We still lack agreed safety standards for how much autonomy is safe to hand over.

Billions of people still lack reliable, affordable internet, cutting them off from education, healthcare information, and economic opportunity. Closing this gap remains a matter of infrastructure cost, not lack of demand.

Nearly every major hack traces back to a bug that existed long before anyone found it. Catching these flaws before release, rather than after damage is done, remains an unsolved challenge.

Modern AI models are often accurate but operate like black boxes, even to the people who built them. Without a way to explain their reasoning, it's hard to trust them in medicine, law, or other high-stakes decisions.

Current searches scan a tiny fraction of the sky and only for a narrow range of signals. Without better tools, we may be missing evidence of other intelligent life simply because we aren't looking in the right way.

Neuroscience can map which brain regions activate during thought, but nobody can explain why that activity produces subjective experience at all. This gap separates our understanding of the brain from any real understanding of the mind.

We know roughly when life began, but not the exact chemical steps that turned non-living matter into something that could reproduce. Solving this would also tell us where else in the universe life might arise.

According to our best theories, matter and antimatter should have destroyed each other completely after the Big Bang. Yet matter clearly won out, and we still don't know why.