Water electrolysis is a process that uses electricity to split water (H2O) into its basic components: hydrogen (H2) and oxygen (O2). This occurs in an electrolyzer, which contains two electrodes—an anode and a cathode—immersed in water. When an electric current passes through the water, it causes chemical reactions at the electrodes, releasing hydrogen gas at the cathode and oxygen gas at the anode. The hydrogen produced through water electrolysis can be used as a clean fuel source, while the oxygen can be released into the atmosphere or utilized in various industrial applications. This method is considered environmentally friendly, especially when powered by renewable energy sources like solar or wind.