<li><b>Coal gasification:</b> Coal gasification is a process that converts coal into a gas mixture containing hydrogen, carbon monoxide, and other gases. The hydrogen can then be separated from the gas mixture.</li>
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<p>Fuel cells are a key component of water-powered vehicles, as they provide a clean and efficient way to convert hydrogen into electricity to power the vehicle's electric motor.</p>
<li><b>Chemical hydrides:</b> These compounds react with water to release hydrogen, but the process is often irreversible and requires regeneration of the hydride material.</li>