May 10, 2013· The Advantages and Disadvantages of Geothermal Energy. Unlike fuels such as coal, natural gas and petroleum, they can easily be hauled from the source to the user, even if it's miles away. Lastly, the hazard of geothermal gases can produce. Tapping onto this energy may bring forth release of potentially harmful and hazardous chemicals, as well as gases such as hydrogen sulfide.