Near some heat sources, the ground beneath Chicagoans’ feet has warmed by 27 degrees Fahrenheit over the past seven decades, he found. Dr. Rotta Loria is chief technology officer for Enerdrape, a start-up in Switzerland making panels that absorb the ambient heat in tunnels and parking garages and use it to run electric heat pumps, cutting down on utility bills. Dr. Rotta Loria purposefully didn’t include one factor in his estimates of underground warming in Chicago: climate change at the city surface. They cost Dr. Rotta Loria $55 each. The post Heat Down Below Is Making the Ground Shift Under Chicago appeared first on New York Times.