Buildings are a major source of Canada’s carbon emissions, especially in urban areas. An innovative heating and cooling technology called heat pumps could help lower building emissions significantly. Instead of burning natural gas for heating, air pumps utilize the temperature difference between indoor and outdoor environment (air, ground, water). While heat pumps are widespread in Europe, they are relatively new in Canada. TAF’s Heat Pump Researcher Devon Calder explains this unique opportunity in his guest contribution for the Ground Water Canada magazine (page 22).