World Solve

Concrete and asphalt trap heat, turning cities into dangerous hot zones during extreme weather, especially for people without air conditioning. Redesigning cities to stay cooler is now a matter of public safety, not comfort.

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.

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.