London Underground

London Underground

The London Underground is getting hotter because the clay that the tunnels are dug into spent decades absorbing heat and has now reached maximum capacity, so it is now insulating the tunnels. So essentially London underground clay is no longer cold enough to absorb local heat, so the heat generated by tunnel usage just stays in the environment. When the tube was first built it was much cooler than the city above.

Previous Fact Next Fact
Categories: PlacesWeather

Latest FactRepublic Video

32 Incredible Easter Eggs You Missed in Harry Potter Movies