You can use geothermal methods to heat and cool your house. If you dig a channel six feet down in the ground under your house, you access an area where the temperature remains relatively constant year-round. To find out more, visit the Geoexchange web site, which has more information that you've ever want to know about this sort of thing. So how do you make it sexy? We'll that's up to you — how to use all the geothermal heat.