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This was due to coal-fired trains? Cigarettes?

• julienchastang 8y ago
  Yes. Yes. And decades of accumulated grime.
  • Aloha 8y ago
    GCT has never had a coal fired train in it - its always been an electric only station, Penn is the same.
    • smpetrey 8y ago
      While that's true, it was only until 2003 smoking was banned completely from GCT.
• NeedMoreTea 8y ago
  Don't forget coal fired heating, and the air prior to clean air legislation. Smogs were a common occurrence and included industrial and coal smoke. Much like is seen in China and India today. Smogs were not just of Victorian London. :)