Just a PSA: there is zero chance that nuclear fusion makes a meaningful impact in stopping climate change in the next 30 years.

Before it becomes a significant part of our energy mix, fusion needs to be cheap, safe, and reliable. It is nowhere close to any of these things right now, and it will take a lot of time and money to get there - especially the "cheap" part. It's simply not going to happen before the year ~2050.

The technologies that have a chance to stop climate change are solar, wind, and energy storage.