Groundwater can also become a new source of energy for heating and cooling the public. Wuhan Municipal Construction Committee April 11, 2006 Information: Wuhan City, the development and utilization of groundwater resources heating and cooling technology to promote the use of heat pump has now entered the feasibility study demonstration phase. Heat pump technology is a kind of equipment that can obtain low-grade heat from the water, air or soil in nature, produce power with high power and output usable heat energy. As the groundwater temperature is maintained at about 18 ℃ all the year round, the pumped water enters the room through pipes and can achieve the effect of heating in winter and cooling in summer. Using underground water for heating and cooling does not require the consumption of coal and fuel, reducing the amount of non-renewable energy used. The entire recycling process to take "vacuum packaging", effectively eliminate pollution. It is reported that the city to promote the use of heat pump technology has been included in the "warm winter cool project."