Geothermal and the Knox County Environment Concerned about the environment? Sure, we all are. By choosing a geothermal product you produce no toxic greenhouse gasses such as carbon monoxide into your environment. Your family's safety is a top priority to you and we understand that. Providing a place of comfort and safety for your family just makes good sense. You accomplish both when you choose geothermal. Here are some agencies that agree. The EPA (Environmental Protection Agency) and the DOE (Department of Energy) determined that geothermal heat pumps are the most environmentally safe and cost-efficient way to heat and cool your home. So now you know WaterFurnace units are truly a natural, green way to live.