Just a thought as well, if this would be the aftermath of large-scale industrial mining, shouldn't nations which house a lot of miners mandate mining farm operators to plant a tree, or at least help plant one per machine that they are using? Not a very bright idea but people should be doing this if they really want to help. Sure we can always switch to the cleaner and greener type of algorithm (PoS and other stuff) and use renewable energy sources to power up the machines, but that would take long or perhaps be more costly to the end of operators, so why not use conventional energy methods, but in turn they need to plant a tree to at least lessen the impacts of their operations?

Idk, not the brightest idea out there but surely one that's worth considering and noting anyway.