2025 is a critical year for climate tech

One company, called Stegra, is close to starting up the world’s first commercial green steel plant, which will make the metal using hydrogen from renewable sources. (You might know this company by its former name, H2 Green Steel, as we included it on our 2023 list of Climate Tech Companies to Watch.)

When I first started following Stegra a few years ago, its plans for a massive green steel plant felt incredibly far away. Now the company says it’s on track to produce steel at the factory by next year.

The biggest challenge in this space is money. Building new steel plants is expensive—Stegra has raised almost $7 billion. And the company’s product will be more expensive than conventional material, so it’ll need to find customers willing to pay up (so far, it has).

There are other efforts to clean up steel that will all face similar challenges around money, including another play in Sweden called Hybrit and startups like Boston Metal and Electra, which use different processes. Read more about green steel, and the potential obstacles it faces as we enter a new phase of commercialization, in this short blurb and in this longer feature about Stegra.

Cow burp remedies

Humans love burgers and steaks and milk and cheese, so we raise a whole bunch of cows. The problem is, these animals are among a group with a funky digestion process that produces a whole lot of methane (a powerful greenhouse gas). A growing number of companies are trying to develop remedies that help cut down on their methane emissions.