There’s nothing anyone can do about it. As long as someone somewhere in the world keeps mining it will continue to exist.
It would take the equivalent of a world war effort to, maybe, get enough people to stop mining, that a 51% attack could be successfully carried out. At which point the community would just fork and continue on.
The only realistic option is to outcompete it. Build something better, where even the most greedy bad actors want in on the new thing, not because it’s better for the environment, but because it’s better for them (and happens to also be better for the environment).
What people can do though, is try to get gas-powered leaf blowers banned in your neighborhood, and expand from there.