The article discusses storing hydrogen for use as fuel. It compares hydrogen with other fuels and lists ways to store it. It mentions characteristics needed for materials to store hydrogen in a solid state and mentions the US Department of Energy's goal in this field. The article explores options for solid-state hydrogen storage and lists the maximum amount of hydrogen solid materials can hold. It talks about carbon materials' role and the varying results in storing hydrogen. The diverse results in carbon materials are attributed to different reasons.