Our first field trip out of Reyjkavik was to see some of the many geothermal areas that supply hot water to make electric power and bring warm water into about 99% of Iceland's communities. It's amazing to see miles of pipe running from natural hot springs bringing boiling hot water into homes and outdoor swimming pools for the use of the people. I'm told the energy provided this way is very inexpensive. They have an unlimited supply throughout the island of Iceland.
