Geothermal Energy

So i just read an article on Geothermal Energy and i love the idea of it, i think it could really help the environment. Geothermal Energy is heat that we can get to warm houses and other buildings just by tapping in to the Earth without affecting it at all. This process is being used in 20 different countries including the United States. I feel like Geothermal Energy has the potential of really helping us cut down on the amount of oil and coal that we use, and another plus that everyone would enjoy it's about 80 percent cheaper overall. Geothermal Energy also uses only about one sixth as much cabon dioxide than other types of heating, and it is available 365 days a year. There is still one question we need answered, if we take all this heat from inside the Earth will more heat keep being produced or can we run out of heat under the Earth and then places will start to get colder. I really hope that this is a safe and renewable way of heating our homes or offices

http://environment.nationalgeographic.com/environment/global-warming/geothermal-profile/