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Ask Curbed: The Air Down There

[Photo of 9th St. PATH station via citynoise]

From the extra-deep Hudson tubes and the even-deeper mind of a friend of Curbed comes this Monday query:

Jersey jokes aside, what's the deal with the way the PATH system smells? It's a totally different bouquet from the more varied panoply of MTA stank. What on earth could they be pumping through those tunnels to make it smell that way? If you don't believe me, head down into the 14th St. station where you can sniff out the different tunnels close at hand.We haven't been this perplexed since the whole maple syrup thing.