Geothermal heat pumps (GHPs) use the ground as an energy storage device and are far more efficient than conventional HVAC equipment. GHPs transfer heat from the building to the ground during the cooling season, and transfer heat from the ground to the building during the heating season. There are over one million GHPs in service in the United States today, including over 1,000 at schools and colleges. President Bush has a GHP system installed at his ranch in Crawford, Texas. Energy efficiency and clean, renewable energy will mean a stronger economy, a cleaner environment, and greater energy independence for America. Working with a wide array of state, community, industry, and university partners, the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy invests in a diverse portfolio of energy technologies.