A long train of aggregate wagons filled with dirty and contaminated ballast stretches for over a mile along the mainline tracks on the edge of the forest as ballast cleaning and track renewal are undertaken. Contrasting the difference in the colour between the newly laid cleaned ballast and the old dirty ballast I can't help but consider what sorts of contaminates must line our rail network and how polluting our modern ways are. I wonder where all the contaminated ballast goes.
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