What's a blockchain?
It's a thing for people who don't have the faintest idea what it is to talk about, helping disinformation, and obscurantism.
Data structures and computer science concepts don't destroy the environment. Imagine if you developed irrational reactions for other data structures, like a vector or a matrix.
Maybe you want Bitcoin miners to stop consuming energy that has been produced and planned for in China.
If you want that, say that, stop being so offensively ignorant.