Geothermal water from deeper in the Earth can be used directly for heating homes and offices, or for growing plants in greenhouses. Some U.S. cities pipe geothermal hot water under roads and ...

Currently, most geothermal projects simply drill deep into the earth, pipe down water to extract the heat and bring it to the surface to use either as raw heat or run an electric generation turbine.

A Winnipeg firm hopes to determine how a geothermal system could capture “waste” heat from a city-owned arena and use it to ...