There is no ‘best type’ of renewable energy, as use widely depends on location. Iceland, for example, has ample geothermal resources, while places like the highlands of Scotland are well-suited to wind power. In other areas, solar energy is best suited while the United States has invested in hydroelectric power. Each type of renewable energy has benefits and drawbacks, often related to supply, meaning that the best solution is often to use a variety of types of resource in together.