You can reduce carbon emissions but ceasing mining, in a nuclear war you could hide in it, and in a post-apocalyptic world it would provide a good source of energy.
Your very own Swiss-army coal-mine! It can also be used as a hidden lair for secret planning, a well-heated winter home, and if you make a couple of changes to your strength training, a place to turn your personal exercise/workouts into valuable coal that you can sell for money.
Wait — what use do you have in mind for a coal-mine?
You can reduce carbon emissions but ceasing mining, in a nuclear war you could hide in it, and in a post-apocalyptic world it would provide a good source of energy.
Your very own Swiss-army coal-mine! It can also be used as a hidden lair for secret planning, a well-heated winter home, and if you make a couple of changes to your strength training, a place to turn your personal exercise/workouts into valuable coal that you can sell for money.