Since the mid-20th century, the ground between the city surface and the bedrock has warmed by 5.6 degrees Fahrenheit on average, according to a new study out of Northwestern University.
“All around you, you have heat sources,” said the study’s author, Alessandro F. Rotta Loria, walking with a backpack through Millennium Station, a commuter rail terminal underneath the city’s Loop district.
“These are things that people don’t see, so it’s like they don’t exist.”It isn’t just Chicago.
In big cities worldwide, humans’ burning of fossil fuels is raising the mercury at the surface.
But heat is also pouring out of basements, parking garages, train tunnels, pipes, sewers and electrical cables and into the surrounding earth, a phenomenon that scientists have taken to calling “underground climate change.”
Persons:
”, Alessandro F, Rotta
Organizations:
Northwestern University .
Locations:
“, Chicago