To me geothermal seems like the most promising of the potential renewable energy sources.
I am a gigantic fan of geothermal.
Why does Hawaii or any of the seismicly active Pacific Coast States need to import one drop of oil?
We have had a geothermal heating cooling system for almost two years. It is wonderful! Our home stays a consistant temperature all year round. In the winter we used to freeze with our electric baseboard. The temperature in the house went up and down. The thermostat for our geothermal stays within a tenth of degree which means if the temp goes down by a tenth of a degree the system kicks on. This means that it runs more often than an oil or gas furnace does. The only power needed is for the fan and the pump that circulates the coolant out and back from the ground. I have to admit that I am still not sure how it works but it does!