This infographic on Geothermal energy's pros and cons highlight the benefits and drawbacks of geothermal energy. To control the heat and cool your home, geothermal systems use underground loops to transmit heat to and from the Earth. Geothermal energy emits less pollution, is 30-50 percent more efficient than fossil-fuel systems, and costs less over time, with people spending 30-60 percent less on heating and 25-50 percent less on cooling. However, the heat pump is powered by electricity, and there are not as many HVAC contractors who install, service and repair geothermal systems. This image of the geothermal energy pros and cons aids in a better understanding of geothermal energy systems.