>>53428260
Yes, every industry uses it in one way or another. Look at fertilizer supplyers, they're fucked if they can't get gaz (which is a byproduct of oil refinery).
>>53428281
To be fair they already have a few desalting plants, but they use fossile fuel and aren't very "clean" obviously. Fusion could make the process 10x more efficient. Same for hydrogen production and tons of other applications.
What's interesting with fusion, is that contrary to fusion, it's possible to downsize the infrastructure a lot. So in theory, you could have portable -and safe- fusion reactors like in fallout. Imagine the possibilities, they're almost endless. We're still far from it of course.