"Until then I had never even heard of it or recognised the existence of such material (since then I can't help but notice the adverts on some service station forecourts or the storage tanks themselves)."
Hello, where have you been?
diesel vehicles both large and small have been using AdBlue since at least 2010 in N. America and the EC....
Specifically to reduce NOx to N2 and H20.
Charlie
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Unimog U500 w/Unicat
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