jm + ventilation   1

London's Tube has been running so long it's literally raising the temperature of the earth around it | CityMetric
London has been running tube trains so long that the ground beneath parts of the city is now as much as 10°C hotter than it was in 1900.
london  tube  underground  tfl  engineering  history  temperature  ventilation 
june 2017 by jm

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