The Download: 10 climate tech companies to watch

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology.

Each year, MIT Technology Review puts together a list of the most promising climate tech companies in the world. This year, the stakes feel higher than ever. The world is on track for one of its hottest years on record, climate-fueled disasters are taking lives and costing billions, while political shifts and international conflict have stalled progress.

We urgently need to cut emissions and avoid climate change’s most harmful effects, and that’s where our 10 companies come in.

They’re working on everything from mobile flood barriers and semi-solid-state batteries to compressed-CO₂ energy storage and next-generation nuclear reactors. They also reflect the biggest shifts in climate tech—including the surging energy demands of AI data centers.

Meet the 10 companies working on some of the biggest challenges in climate tech.

Over the coming days, we’ll take a closer …