We keep seeing these nitrogen tankers on the county road and it took a while for us to find out what was going on.
A coal mine fire! The trucks are off loading to a tank and nitrogen is sent in a temporary pipeline to a borehole into the mine. We have been told that the fire is out, but nitrogen continues to be sent down to cool the burned area until it will not be able to rekindle.
There is a town in PA, I think it is spelled Centralia where a coal mine has been burning since the 1950s, or thereabouts. All efforts to extinguish it have failed. Believed to have enough fuel for another 200 years or more.
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