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Consider coal and steel. There is a place where they meet. The interface between coal and steel is coal-tar. Imagine coal, down in the earth, dead black, no light, the very substance of death. Death ancient, prehistoric, species we will never see again. Growing older, blacker, deeper, in layers of perpetual night. Above ground, the steel rolls out fiery, bright. But to make steel, the coal tars, darker and heavier, must be taken from the original coal. Earth's excrement, purged out for the ennoblement of shining steel. Passed over.
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