The emissions from a coal plant somewhere across the ocean affects my weather here in California. In an anarchy, are you saying I would get a voice in the operation of that remote coal plant? How would that work, exactly?
The logistics of how to reach world-wide consensus, or at least something close to it, is an interesting question I don't have an answer to! Maybe coal plants would be practically impossible under anarchy, due to the consensus difficulties -- which one might argue is as it should be.
How would this be enforced? You wouldn't get any coal miners or other material providers to help you unless you can show your coal plant is truly something humanity at large either wants, or at least does not care about.