Some energy resources that are renewable or not in danger of running out are?

Wind, solar, tidal, and geothermal are the most commonly used renewable resources, and none are in danger of running out. However they are best used where most appropriate; solar energy is best used in desert areas like the American southwest, North Africa, and the Middle East, where the sun shines brightest. Wind is also efficient in the desert regions, along with the American midwest farm areas. Geothermal is popular in Iceland, where Alcoa built an aluminum smelter powered by geothermal, while Tidal power is used off the New England coast, and Germany's North Sea.