Hydrogen is the simplest element exist on Earth and is a energy carrier. Hydrogen is rarely found by itself in nature and must be produced from substances that contain it. Hydrogen can store and distribute useable energy. The production of hydrogen can be done in a low-carbon manner using a variety of domestic resources, such as nuclear energy and renewable energy sources including wind, solar, geothermal, and hydroelectric power, as well as fossil fuels like coal and natural gas combined with carbon capture and storage. Utilizing hydrogen can enable zero or nearly zero emissions in transportation, integrated renewable energy systems, and other industrial and chemical operations. Emerging hydrogen markets within these sectors include data centers, ports, steel manufacturing, and medium- and heavy-duty trucks.