Final answer:
The island of El Hierro uses a combination of wind and hydroelectric power to generate its energy.
Step-by-step explanation:
The island of El Hierro uses a combination of renewable energy sources for its energy system. It mainly relies on wind and hydroelectric power. El Hierro has a wind farm consisting of five wind turbines that generate electricity. Additionally, it has a hydroelectric power station that utilizes the energy from a natural volcanic crater lake. These renewable energy sources provide a sustainable and eco-friendly energy system for the island.
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