Geo Thermal Heat Pump uses the temperature of the earth to it's advantage. The ground stays warmer in the winter and cooler in the summer
than above the earth.
There are many options for renewable energy from solar to wind, geo thermal to bio mass. There are more options I am sure that I am unaware of. The is a serious problem when groups try to pretend their interest it the sole way to go to deal with the growing demands of energy. The true solution to energy demands is to use all reasonable options. (This includes oil but that is not what this page is about. LOL) Anyway, take a look at these video to know our options and be aware of how energy consumption matters to everyone on the planet.